<s>
This	O
is	O
a	O
list	O
of	O
notable	O
open-source	B-Application
video	I-Application
games	I-Application
.	O
</s>
<s>
Open-source	B-Application
video	I-Application
games	I-Application
are	O
assembled	O
from	O
and	O
are	O
themselves	O
open-source	B-Application
software	I-Application
,	O
including	O
public	O
domain	O
games	O
with	O
public	O
domain	O
source	O
code	O
.	O
</s>
<s>
This	O
list	O
also	O
includes	O
games	O
in	O
which	O
the	O
engine	O
is	O
open-source	B-Application
but	O
other	O
data	O
(	O
such	O
as	O
art	O
and	O
music	B-Application
)	O
is	O
under	O
a	O
more	O
restrictive	O
license	B-License
.	O
</s>
<s>
The	O
games	O
in	O
this	O
table	O
are	O
developed	O
under	O
a	O
free	B-License
and	I-License
open-source	I-License
license	B-License
with	O
free	O
content	O
which	O
allows	O
reuse	O
,	O
modification	O
and	O
commercial	O
redistribution	O
of	O
the	O
whole	O
game	O
.	O
</s>
<s>
Licenses	O
can	O
be	O
public	O
domain	O
,	O
GPL	B-License
,	O
BSD	B-Operating_System
,	O
Creative	O
Commons	O
,	O
zlib	B-Language
,	O
MIT	B-License
,	O
Artistic	B-License
License	I-License
or	O
other	O
(	O
see	O
the	O
comparison	O
of	O
Free	B-License
and	I-License
open-source	I-License
software	I-License
and	O
the	O
Comparison	B-Application
of	I-Application
free	I-Application
and	I-Application
open-source	I-Application
software	I-Application
licenses	I-Application
)	O
.	O
</s>
<s>
Game	O
source-code	O
released	O
July	O
10	O
,	O
2009.204820142014PuzzleMITMIT2DA	O
sliding	O
block	O
puzzle	O
game.A	O
Dark	O
Room20132013Online	O
text-based	O
role-playing	O
gameMozilla	O
Public	O
LicenseMozilla	O
Public	O
LicenseTextIn	O
July	O
2013	O
the	O
source	O
code	O
of	O
the	O
game	O
was	O
put	O
on	O
GitHub	B-Application
under	O
MPL	O
2.0.A	O
Dark	O
Room	O
goes	O
open	B-License
source	I-License
on	O
doublespeakgames.com	O
(	O
July	O
3	O
,	O
2013	O
)	O
Became	O
commercially	O
successful	O
after	O
the	O
source	O
code	O
release.Abuse19962011Run	O
and	O
gunPublic-domain	O
softwarePublic	O
domain2DArgentum	O
Online19992018MMORPGGPL-3.0-or-laterGPL-3.0-or-later2DFirst	O
open-source	B-Application
MMORPG	B-Protocol
developed	O
in	O
Argentina.Armagetron	O
Advanced20012020RacingGPL-2.0-or-laterGPL-2.0-or-later3DA	O
multiplayer	O
3D	O
Tron	B-Language
lightcycle	O
racing	B-Device
game.AstroMenace20072019ArcadeGPL-3.0-or-laterGPL-3.0-or-later	O
,	O
CC	O
BY-SA	O
4.03DA	O
top-scrolling	O
space	O
shooter.Ballerburg19872008	O
(	O
ports	O
)	O
Artillery	B-Application
gamePublic-domain	O
softwarePublic	O
domain2DPublic-domain	O
software	O
on	O
the	O
authors	O
website	O
with	O
source	O
code.April	O
1987	O
:	O
Ballerburg	B-Application
-	O
Zwei	O
Spieler	O
,	O
zwei	O
Burgen	O
und	O
ein	O
Berg	O
dazwischen	O
...	O
on	O
eckhardkruse.net	O
"	O
Ich	O
habe	O
das	O
Programm	O
als	O
Public	O
Domain	O
veröffentlicht	O
"	O
(	O
in	O
German	O
)	O
Later	O
ported	O
to	O
other	O
systems	O
such	O
as	O
Linux	B-Application
,	O
MacOS	B-Operating_System
,	O
iOS	B-Application
,	O
etc.The	O
Battle	O
for	O
Wesnoth20052022TBТGPL-2.0-or-laterGPL-2.0-or-later	O
,	O
CC	O
BY-SA	O
4.02DTurn-based	O
tactical	O
strategy	O
game	O
with	O
RPG	O
elements	O
.	O
</s>
<s>
Includes	O
a	O
single-player	O
campaign	O
and	O
skirmish	O
modes	O
as	O
well	O
as	O
multiplayer.Biniax20052012Puzzlezlibzlib2DBos	O
Wars20042013RTSGPL-2.0-or-laterGPL-2.0-or-laterIsometric	O
2D2D	O
real-time	O
strategy	O
game	O
running	O
on	O
a	O
modified	O
version	O
of	O
the	O
Stratagus	B-Application
engine.BZFlag19972022Tank	O
FPSLGPL-2.1-only	O
and	O
MPL-2.0LGPL-2.1-only	O
and	O
MPL-2.03DA	O
first-person	O
shooter	O
3D	O
tank-based	O
multiplayer	O
online	O
game.C-Dogs	O
SDL20022021Run	O
and	O
gunPublic-domain	O
software	O
/	O
GPL-2.0-or-later	B-License
CC0	O
,	O
CC	O
BY	O
,	O
CC	O
BY-SA2DOverhead	O
run-and-gun	O
,	O
with	O
hotseat	O
cooperative	O
and	O
deathmatch	O
play	O
for	O
up	O
to	O
four	O
players.Cart	O
Life20112017SimulationCart	O
Life	O
's	O
Free	O
License	B-License
(	O
permissive	B-License
license	I-License
)	O
Cart	B-Application
Life	I-Application
's	O
Free	O
License	B-License
(	O
permissive	B-License
license	I-License
)	O
,	O
Freeware2DIn	O
March	O
2014	O
the	O
source	O
code	O
and	O
game	O
was	O
made	O
available	O
by	O
Richard	B-Application
Hofmeier	I-Application
for	O
free	O
online	O
,	O
saying	O
he	O
was	O
finished	O
supporting	O
the	O
game.cartlife_opensores.zip	O
on	O
the	O
author	O
's	O
dropbox	O
Winner	O
of	O
the	O
IGF	O
2013	O
award	O
.	O
</s>
<s>
Mirrored	O
on	O
GitHub.cartlife_srcCataclysm	O
:	O
Dark	O
Days	O
Ahead20132023RPG/RoguelikeCC	O
BY-SA	O
3.0CC	O
BY-SA	O
3.02DA	O
post-apocalyptic	O
survival	B-Application
roguelike	O
with	O
open-ended	O
gameplay	O
.	O
</s>
<s>
Announcement	O
on	O
Polish	O
Portal	B-Application
of	O
Colobot	B-Application
Original	O
Colobot	B-Application
source	O
code	O
release	O
license	B-License
Since	O
then	O
,	O
the	O
game	O
is	O
maintained	O
by	O
the	O
community	O
as	O
Colobot	B-Application
:	O
Gold	O
Edition.Colobot	O
:	O
Gold	O
Edition	O
READMEColossal	O
Cave	O
Adventure19761995Text	O
adventurePublic-domain	O
softwarePublic	O
domainTextThe	O
original	O
text	O
adventure	B-Application
game	O
by	O
Crowther	O
and	O
Woods.Core	O
War19841984Programming	O
gameVarious	O
(	O
public	O
domain	O
,	O
BSD	B-Operating_System
,	O
GPL	B-License
)	O
corewar	B-Application
on	O
SourceForgeVariousTextOriginal	O
created	O
by	O
D	O
.	O
G	O
.	O
Jones	O
and	O
A	O
.	O
K	O
.	O
Dewdney	O
,	O
and	O
continued	O
through	O
the	O
present	O
day	O
by	O
the	O
community.Crossfire19922019MMORPGGPL-2.0-or-laterGPL-2.0-or-later2DCrossfire	O
originally	O
started	O
as	O
a	O
Gauntlet	B-Device
cloneftp://ftp.ifi.uio.no/pub/crossfire/historic	O
developed	O
by	O
Frank	O
Tore	O
Johansen	O
at	O
the	O
University	O
of	O
Oslo	O
,	O
Norway.Diamond	O
Trust	O
of	O
London20122012TBSPublic-domain	O
softwarePublic	O
domain2DFollowing	O
a	O
Kickstarter	O
crowdfunding	O
campaign	O
,	O
Diamond	B-Application
Trust	I-Application
of	I-Application
London	I-Application
was	O
developed	O
by	O
Jason	O
Rohrer	O
and	O
published	O
by	O
indiePub	O
.	O
</s>
<s>
On	O
August	O
28	O
,	O
2012	O
,	O
it	O
was	O
released	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
.	O
</s>
<s>
The	O
game	O
has	O
been	O
placed	O
in	O
the	O
public	O
domain	O
,	O
hosted	O
on	O
SourceForge	B-Application
,	O
like	O
most	O
of	O
Rohrer	O
's	O
games.DRL20132016RoguelikeGPL-2.0-or-laterCC	O
BY-SA	O
4.02.5DBased	O
on	O
Doom	B-Application
and	O
Doom	B-Application
II.Dungeon	O
Crawl	O
Stone	O
Soup20062022RoguelikeGPL-2.0-or-laterCC02DAn	O
open-source	B-Application
fork	B-Application
of	O
the	O
1997	O
game	O
Linley	O
's	O
Dungeon	O
Crawl.Endgame	O
:	O
Singularity20052020Science	O
fiction/AI	O
simulation	O
gameGPL-2.0-or-laterCC	O
BY-SA	O
3.02DWritten	O
in	O
Python	B-Language
by	O
EMH	O
,	O
later	O
continued	O
by	O
the	O
community.singularity	O
on	O
github.comEnigma20032014PuzzleGPL-2.0-or-laterGPL-2.0-or-later2DOxyd	O
clone.Fish	O
Fillets	O
NG20042011PuzzleGPL-2.0-or-laterGPL-2.0-or-later2DReleased	O
commercially	O
as	O
Fish	B-Application
Fillets	I-Application
in	O
1998	O
.	O
</s>
<s>
Source	O
released	O
in	O
2002	O
under	O
GPL-2.0-or-later.FlightGear19972022Flight	O
SimGPL-2.0-or-laterGPL-2.0-or-later3DMicrosoft	O
Flight	O
Simulator-inspired	O
clone.Freeciv19962022TBSGPL-2.0-or-laterGPL-2.0-or-laterIsometric	O
2DCivilization	O
II	O
clone.FreeCol20032022TBSGPL-2.0-or-laterGPL-2.0-or-laterIsometric	O
2DSid	O
Meier	O
's	O
Colonization	B-Application
clone.FreeDink20062019RPGGPL-3.0-or-laterGPL-3.0-or-later2DFriday	O
Night	O
Funkin'20202021RhythmMIT	O
License	B-License
/	O
Apache	B-Application
License	I-Application
2.0	O
Apache	B-Application
License	I-Application
2.0	O
(	O
may	O
be	O
non-commercial	O
)	O
2DA	O
bi-dimensional	O
rhythm	O
game	O
,	O
with	O
gameplay	O
reminiscent	O
of	O
Dance	B-Application
Dance	I-Application
Revolution	I-Application
and	O
aesthetics	O
reminiscent	O
of	O
early-to-mid-2000s	O
browser	O
games.Frozen	O
Bubble20022008PuzzleGPL-2.0-onlyGPL-2.0-only2DPuzzle	O
Bobble	O
clone.Gang	O
Garrison	O
220082019ShooterProprietary	O
/	O
MPLv2	B-License
MPLv22DA	O
retro	O
"	O
demake	O
"	O
of	O
Team	B-Application
Fortress	I-Application
2	I-Application
.	O
</s>
<s>
The	O
project	O
was	O
previously	O
under	O
GPLv3.Glest20042008RTSGPL-3.0-or-laterCC	O
BY-SA	O
3.03D3D	O
real-time	O
strategy	O
game	O
with	O
two	O
factions	O
,	O
AI	O
,	O
and	O
same-platform	O
networking	O
support	O
.	O
</s>
<s>
Two	O
forks	B-Application
exist	O
,	O
named	O
MegaGlest	B-Application
and	O
Glest	B-Language
Advanced	O
Engine.Globulation	O
220082009RTSGPL-3.0-or-laterGPL-3.0-or-later2DIn	O
open	O
beta	O
as	O
of	O
2019.GLtron20032016RacingGPL-2.0-or-laterGPL-2.0-or-later3DBased	O
on	O
the	O
light	O
cycle	O
portion	O
of	O
the	O
film	O
Tron.GNOME	O
Games19972021VariousGPL-3.0-or-laterGPL-3.0-or-laterA	O
collection	O
of	O
games	O
accompanying	O
the	O
rest	O
of	O
the	O
GNOME	O
desktop	O
environment.GNU	O
Chess19842021TBSGPL-3.0-or-laterGPL-3.0-or-later2DChess-playing	O
engine	O
developed	O
by	O
the	O
GNU	O
Project.GNU	O
Go19992009TBSGPL-3.0-or-laterGPL-3.0-or-later2DGo-playing	O
engine	O
developed	O
by	O
the	O
GNU	O
Project.Hunt	O
the	O
Wumpus19731981Survival	O
horror/adventure/puzzleVarious	O
(	O
Public-domain	B-Application
software	I-Application
,	O
GPLv2	B-License
,	O
MIT	B-License
)	O
Various	O
(	O
Public-domain	B-Application
software	I-Application
,	O
GPLv2	B-License
,	O
MIT	B-License
)	O
2DHunting	O
a	O
monster	O
called	O
Wumpus	O
while	O
moving	O
through	O
caves.HyperRogue20112021Puzzle/Roguelike/EducationalGPL	O
-2.0-or-laterGPL-2.0-or-laterHyperbolicPuzzle	O
roguelike	O
in	O
the	O
hyperbolic	O
plane.kiki	O
the	O
nano	O
bot20032007PuzzlePublic-domain	O
softwarePublic	O
domain3DMixture	O
of	O
Sokoban	B-Device
and	O
Kula	O
World.Lincity19992013City-building	O
gameGPL-2.0-onlyGPL-2.0-only2.5DSimCity	O
clone.Liquid	O
War19952015Maze	O
gamesGPL-3.0-or-laterGPL-3.0-or-later2D2D	O
game	O
in	O
which	O
you	O
control	O
particles	O
and	O
move	O
them	O
to	O
defeat	O
the	O
opposing	O
side.Lugaru20052017Action/third	O
-person	O
shooterGPL-2.0-or-laterCC	O
BY-SA3DA	O
game	O
by	O
Wolfire	O
Games	O
where	O
the	O
player	O
is	O
an	O
anthropomorphic	O
rabbit	O
who	O
seeks	O
revenge	O
when	O
a	O
group	O
of	O
enemy	O
rabbits	O
kill	O
their	O
family.Maelstrom19922010Shoot	O
'	O
em	O
upGPL-2.0-onlyCC	O
BY	O
3.02DMari020122018Platformerzlib	O
License	B-License
/	O
MIT	B-License
License	I-License
MIT2DRemake	O
of	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
with	O
elements	O
from	O
Portal.MegaGlest20102016RTSGPL-3.0-or-laterCC	O
BY-SA	O
3.03DCross-platform	O
3D	O
real-time	O
strategy	O
game	O
for	O
up	O
to	O
eight	O
players	O
(	O
can	O
be	O
AI-controlled	O
)	O
on	O
seven	O
factions	O
.	O
</s>
<s>
MegaGlest	B-Application
is	O
a	O
fork	B-Application
of	O
Glest.Minetest20102022Sandbox	O
,	O
Survivalzlib	O
/	O
LGPL-2.1-or-later	B-Application
LGPL-2.1-or-later3DA	O
voxel	O
engine	O
for	O
building	O
games	O
similar	O
to	O
Infiniminer	O
and	O
Minecraft.Moria19831999RPG/RoguelikeGPL	O
-2.0-onlyGPL-2.0-only2DRoguelike	O
RPG	O
based	O
heavily	O
on	O
J	O
.	O
R	O
.	O
R	O
.	O
Tolkien	O
's	O
novel	O
The	O
Lord	O
of	O
the	O
Rings.NetHack19872020RPG/roguelikeNetHack	O
GPLNetHack	O
GPLTextSingle-player	O
dungeon	O
exploration	O
game.Netrek19882020Shoot	O
'	O
em	O
upMITMIT2DA	O
successor	O
to	O
1986	O
's	O
Xtrek	O
,	O
Netrek	B-Application
was	O
first	O
played	O
in	O
1988	O
.	O
</s>
<s>
It	O
was	O
the	O
third	O
Internet	O
game	O
,	O
the	O
first	O
Internet	O
team	O
game	O
,	O
and	O
as	O
of	O
2022	O
is	O
the	O
oldest	O
Internet	O
game	O
still	O
actively	O
played.Nexuiz20052009FPSGPL-2.0-or-laterGPL-2.0-or-later3DForked	O
into	O
Xonotic.NoGravity1997	O
(	O
?	O
</s>
<s>
)	O
2005Space	O
shooterGPL-2.0-or-laterGPL-2.0-or-later3DSource	O
code	O
of	O
the	O
Wing	O
Commander-inspired	O
game	O
released	O
by	O
realtech	B-Application
VR	I-Application
on	O
February	O
16	O
,	O
2005.No	O
Gravity	O
(	O
Classic	O
)	O
on	O
sourceforge.netOne	O
Hour	O
One	O
Life20182022SurvivalPublic	O
domainPublic	O
domain2DMultiplayer	O
co-op	O
survival	O
game.Oolite20062020Space	O
SimGPL-2.0-or-laterDual-licensed	O
under	O
GPL-2.0-or-later	B-License
and	O
CC	O
BY-NC-SA-3.03DElite	O
clone.OpenArena20052012FPSGPL-2.0-or-laterGPL-2.0-or-later3DQuake	O
III	O
clone.OpenCity20032008City-building	O
gameGPL-2.0-or-laterGPL-2.0-or-later3DSimCity	O
clone.OpenClonk20102018Action	O
,	O
PlatformISCCC	O
BY2DSuccessor	O
of	O
the	O
Clonk	B-Application
shareware	B-License
series.OpenTTD20052023Business	O
SimGPL-2-0-onlyGPL-2-0-only	O
,	O
GPL-2-0-or-later	B-License
,	O
CC	O
BY-SA	O
3.0	O
,	O
CDDL	B-Application
1.12DOpen-source	O
clone	O
of	O
Transport	B-Application
Tycoon	I-Application
Deluxe.Passage20072007Side-scrollerPublic-domain	O
softwarePublic	O
domain2DIn	O
2007	O
Rohrer	O
released	O
the	O
game	O
's	O
source	O
code	O
and	O
assets	O
into	O
the	O
public	O
domain	O
,	O
supportMyWork	O
on	O
hcsoftware.sourceforge.net	O
"	O
I	O
release	O
all	O
of	O
the	O
source	O
code	O
that	O
I	O
write	O
as	O
free	B-Application
software	I-Application
(	O
free	O
as	O
in	O
"	O
freedom	O
"	O
)	O
into	O
the	O
public	O
domain	O
"	O
(	O
accessed	O
2016	O
)	O
while	O
asking	O
for	O
donations	O
(	O
donationware	B-License
)	O
and	O
selling	O
the	O
iOS	B-Application
version	O
for	O
$0.99	O
.Passage	O
on	O
itunes.apple.comPingus19982011PuzzleGPL-3.0-or-laterGPL-3.0-or-later2DLemmings	O
clone.Pinball	O
Construction	O
Set19821983Pinball	O
,	O
game	O
creation	O
systemMITMIT2DFirst	O
construction	B-Application
set	I-Application
video	O
game	O
,	O
and	O
one	O
of	O
the	O
initial	O
Electronic	O
Arts	O
releases.Pioneer20062022Space	O
simGPL-3.0-onlyCC	O
BY-SA3DInspired	O
by	O
Frontier	O
:	O
Elite	O
2.PokerTH20062017CardAGPL-3.0-or-laterAGPL-3.0-or-later2DOpen-source	O
virtual	O
poker	O
game.Red	O
Eclipse20112019FPSzlib	O
licenseCC	O
BY-SA3DA	O
fork	B-Application
of	O
Cube	B-Application
2	I-Application
:	I-Application
Sauerbraten	I-Application
,	O
with	O
improved	O
graphics	O
and	O
a	O
style	O
of	O
play	O
that	O
incorporates	O
parkour	O
movement.Rigs	O
of	O
Rods20052022Vehicle	O
simGPL-3.0-or-laterGPL-3.0-or-later3DRigs	O
of	O
Rods	O
was	O
initially	O
created	O
as	O
an	O
off-road	O
truck	O
simulator	O
,	O
but	O
has	O
developed	O
into	O
a	O
versatile	O
physics	O
sandbox.Rocks	O
'	O
n'Diamonds19952018PuzzleGPL-2	O
.0-onlyGPL-2.0-only2DA	O
scrolling	O
tile-based	O
computer	O
puzzle	O
game	O
that	O
can	O
be	O
described	O
as	O
a	O
combined	O
Boulder	O
Dash	O
,	O
Supaplex	B-Application
,	O
Emerald	O
Mine	O
,	O
and	O
Sokoban	B-Device
clone.Ryzom20042022MMORPGAGPL-3.0-or-laterCC	O
BY-SA	O
3.03DAll	O
textures	O
and	O
effects	O
,	O
3D	O
models	O
,	O
animations	O
,	O
characters	O
and	O
clothing	O
(	O
no	O
music	B-Application
or	O
sounds	O
)	O
are	O
under	O
CC	O
BY-SA.Scorched	O
3D20012014Artillery	O
gameGPL-2.0-or-laterGPL-2.0-or-later3DClone	O
of	O
Scorched	O
Earth.Secret	O
Maryo	O
Chronicles20032014PlatformerGPL-3.0-or-laterGPL-3.0-or-later2D2D	O
platformer	O
inspired	O
by	O
the	O
Super	B-Application
Mario	I-Application
series.The	O
Secret	O
Chronicles	O
of	O
Dr.	O
M.20172020PlatformerGPL-3.0-or-laterGPL-3.0-or-later2D2D	O
platformer	O
inspired	O
by	O
the	O
Super	B-Application
Mario	I-Application
series.Seven	O
Kingdoms19972017RTSGPL-2.0-or-laterGPL-2.0-or-later2DSource	O
code	O
released	O
in	O
2009.Simutrans19972022Business	O
SimArtisticArtistic2DSimilar	O
to	O
Transport	B-Application
Tycoon	I-Application
and	O
its	O
open-source	B-Application
clone	O
OpenTTD	B-Application
.	O
</s>
<s>
The	O
player	O
must	O
build	O
a	O
profitable	O
transportation	O
system.Sintel	O
The	O
Game20122012RPGGPLCC	O
BY	O
,	O
GPL3DA	O
game	O
based	O
on	O
the	B-License
Blender	I-License
Foundation	I-License
movie	O
Sintel.Soldat20022020ActionMIT	O
licenseCC	O
BY	O
4.0Soldat	O
asset	O
license	B-License
on	O
github.com2DOn	O
May	O
26	O
,	O
2020	O
,	O
the	O
source	O
code	O
of	O
Soldat	B-Language
was	O
released	O
under	O
MIT	B-License
license	I-License
on	O
GitHub.soldat	O
on	O
github.comSopwith19842014Shoot	O
'	O
em	O
upGPLGPL2DThe	O
C	B-Language
and	O
x86	B-Language
assembly	I-Language
source	O
code	O
to	O
Sopwith	B-Application
was	O
released	O
in	O
2000	B-Application
,	O
at	O
first	O
under	O
a	O
non-commercial	O
use	O
license	B-License
,	O
but	O
later	O
under	O
the	O
GNU	B-License
GPL	I-License
at	O
the	O
request	O
of	O
fans.Speed	O
Dreams20102021Sim	O
racingGPL-2.0-or-laterFAL3DForked	O
from	O
TORCS	B-Application
in	O
late	O
2008.StepMania20012018Rhythm	O
gameMITMIT2D	O
,	O
3DA	O
DDR	B-Application
clone	O
,	O
the	O
player	O
must	O
hit	O
buttons	O
or	O
keys	O
in	O
time	O
with	O
the	O
music.SuperTux20032021PlatformerGPL-3.0-or-laterVarious2D2D	O
platformer	O
inspired	O
by	O
the	O
Super	B-Application
Mario	I-Application
series.SuperTuxKart20062021RacingGPL-3.0-or-laterVarious3DArcade	O
racing	B-Device
game	O
similar	O
to	O
Mario	O
Kart.Teeworlds20072020PlatformerzlibCC	O
BY-SA	O
3.0	O
(	O
except	O
font	O
)	O
2D2D	O
online	O
multiplayer	O
side-scrolling	O
shooter.Tenés	O
Empanadas	O
Graciela19962021TBSGPL-2-0-onlyGPL-2-0-only2DBased	O
on	O
the	O
boardgame	O
Risk.The	O
Castle	O
Doctrine20142014MMOPublic-domain	O
softwarePublic	O
domain2DA	O
game	O
by	O
Jason	O
Rohrer	O
,	O
developed	O
on	O
a	O
SourceForgeCastleDoctrine	O
on	O
sourceforge.net	B-Application
repository	O
and	O
sold	O
on	O
Steam	B-Application
for	O
$15.99	O
.Castle	O
Doctrine	O
on	O
store.steampowered.comThe	O
Powder	O
Toy20102021Sandbox	O
gameGPL-3.0-onlyGPL-3.0-only2DFalling-sand	O
game.Tremulous20062009FPSGPLv2CC	O
BY-SA	O
2.5[tremulous]	O
View	O
of	O
/trunk/COPYING3DAlien	O
vs.	O
human	O
base-building	O
,	O
defending	O
,	O
and	O
attacking	O
the	O
opposing	O
team.TripleA20022020TBSGPL-3.0-or-laterGPL-3.0-or-later2DA	O
turn-based	O
strategy	O
game	O
inspired	O
by	O
the	O
board	O
game	O
Axis	B-Application
&	I-Application
Allies	I-Application
.	O
</s>
<s>
Development	O
is	O
ongoing.Tux	O
Racer20002009RacingGPL-2.0-or-laterGPL-2.0-or-later3DA	O
downhill	O
slalom	O
racing	B-Device
game	O
featuring	O
Tux	O
,	O
the	O
Linux	B-Application
mascot.Tux	O
,	O
of	O
Math	O
Command20012011Educational	O
gameGPL-3.0-or-laterGPL-3.0-or-later2DUFO	O
:	O
Alien	O
Invasion20062016TBТGPL-2.0-or-laterGPL-2.0-or-later	O
,	O
CC	O
BY-SA	O
3.03DInspired	O
by	O
the	O
XCOM	O
series	O
but	O
with	O
3D	O
combat	O
on	O
the	O
surface	O
of	O
the	O
Earth.UltraStar	O
Deluxe20072020MusicGPL-2.0-or-laterGPL-2.0-or-later2DSingStar	O
clone.Unknown	O
Horizons20082019City-building	O
gameGPL-x2.0-or-laterGPL-2.0-or-later	O
,	O
CC	O
BY-SA	O
3.0	O
,	O
OFLv1Isometric	O
2DGenre-mix	O
of	O
city-building	B-Application
game	I-Application
and	O
real-time	O
strategy	O
game	O
,	O
inspired	O
by	O
the	O
Anno	B-Application
series.Unvanquished20122022FPSBSD	O
3-clause	O
,	O
GPLv3+CC	O
BY-SA	O
2.53DTeam-based	O
first-person	O
shooter	O
with	O
strong	O
real-time	O
strategy	O
elements	O
,	O
derived	O
from	O
the	O
Tremulous	B-Application
project.Vega	O
Strike20082022Space	O
simGPL-2.0-or-laterGPL-2.0-or-later3DWing	O
Commander	O
:	O
Privateer	B-Application
clone	O
and	O
space	O
simulator	O
engine.Warzone	O
210019992022RTS	O
,	O
RTTGPL-2.0-or-laterGPL-2.0-or-later	O
,	O
CC0	O
,	O
other	O
open	O
source3DPost-apocalyptic	O
cross-platform	O
real-time	O
strategy	O
game.Widelands20022021RTSGPL-2.0-or-laterGPL-2.0-or-laterWidelands	O
is	O
a	O
real-time	O
strategy	O
clone	O
of	O
The	O
Settlers	O
II.WorldForge19982014MMORPGGPL-3.0-or-laterGPL-2.0-or-later3DAn	O
open-source	B-Application
framework	O
for	O
massively	O
multiplayer	O
online	O
role-playing	O
games.Worms	O
?	O
19831983Software	O
toyMITMIT2DAn	O
interactive	O
version	O
of	O
Paterson	O
's	O
worms	O
,	O
and	O
one	O
of	O
the	O
initial	O
Electronic	O
Arts	O
releases.Xconq19872005TBSGPL-2.0-or-laterGPL-2.0-or-later4X	O
strategy	O
game	O
engine.X-Moto20052020PlatformerGPL-2.0-or-laterGPL-2.0-or-later2DElasto	O
Mania	O
clone.Xonotic20102022FPSGPL-2.0-or-laterGPL-2.0-or-later3DA	O
fork	B-Application
and	O
direct	O
successor	O
of	O
Nexuiz	B-Application
.	O
</s>
<s>
Only	O
the	O
game	O
engines	O
in	O
this	O
table	O
are	O
developed	O
under	O
an	O
open-source	B-Application
license	B-License
,	O
which	O
means	O
that	O
the	O
reuse	O
and	O
modification	O
of	O
only	O
the	O
code	O
is	O
permitted	O
.	O
</s>
<s>
As	O
some	O
of	O
the	O
games	O
 '	O
content	O
created	O
by	O
the	O
developers	O
(	O
sound	O
,	O
graphics	O
,	O
video	O
and	O
other	O
artwork	O
)	O
is	O
proprietary	B-Application
or	O
restricted	O
in	O
use	O
,	O
the	O
whole	O
games	O
are	O
non-free	O
and	O
restricted	O
in	O
reuse	O
(	O
depending	O
on	O
the	O
content	O
license	B-License
)	O
.	O
</s>
<s>
when	O
distributed	O
under	O
a	O
non-commercial	O
license	B-License
like	O
CC	O
NC	O
.	O
</s>
<s>
TitleFirst	O
releaseLast	O
releaseGenreEngine	O
licenseContent	O
licenseDimensionsOther	O
informationAngband19902016RoguelikeGPLv2GPLv2	O
,	O
Proprietaryhttps://raw.githubusercontent.com/angband/angband/master/copying.txt	O
The	O
sounds	O
are	O
licensed	O
under	O
the	O
CC	O
BY-NC-SA	O
license	B-License
.	O
</s>
<s>
Shockbolt	O
's	O
graphics	O
are	O
licensed	O
under	O
a	O
non-free	O
license.TextAssaultCube20062013FPSzlibFreeware3DBased	O
on	O
Cube	B-Application
.	O
</s>
<s>
A	O
lightweight	O
online	O
FPS	O
(	O
45-50	O
MB	O
package	O
)	O
,	O
with	O
a	O
built-in	O
map	O
maker	O
and	O
capable	O
of	O
being	O
played	O
with	O
a	O
56k	O
connection.C-evo19992013TBТ	O
,	O
4XPublic-domain	O
softwareProprietary2DInspired	O
by	O
Sid	O
Meier	O
's	O
CivilizationAlien	O
Arena20042011FPSGPLProprietary3DBased	O
on	O
ID	O
Software	O
open-source	B-Application
engine.Cube20022005FPSzlibProprietary3DDeathmatch	O
style	O
multiplayer	O
gameplay	O
with	O
map	O
editing.Cube	O
2	O
:	O
Sauerbraten20042020FPSzlibVarious	O
non-free	O
and	O
some	O
free	O
licenses3DDeathmatch	O
style	O
multiplayer	O
gameplay	O
with	O
map	O
editing.Doom19931997FPSGPLShareware2.5DGame	O
engine	O
source	O
code	O
was	O
released	O
on	O
December	O
23	O
,	O
1997	O
.	O
</s>
<s>
Frets	O
on	O
Fire20062008MusicGPLGPL	O
,	O
Proprietary3DGuitar	O
Hero	O
clone.Frogatto	O
&	O
Friends20102013Platformerzlib	O
licenseProprietaryDeveloper	O
Info	O
Source	O
Code	O
and	O
License	B-License
:	O
 [ ... ] 	O
Our	O
code	O
is	O
open-source	B-Application
,	O
our	O
content	O
is	O
n’t	O
.2DInitially	O
for	O
Windows	O
,	O
Linux	B-Application
,	O
and	O
Mac	O
;	O
hold	O
and	O
toss	O
enemies	O
,	O
swim	O
,	O
talk	O
;	O
scripting	O
language	O
included.Gravity	O
Bone20082009PlatformerGPLv2Freeware3DBrendon	O
Chung	O
built	O
this	O
game	O
on	O
base	O
of	O
the	O
Quake	B-Application
II	I-Application
engine	I-Application
and	O
released	O
therefore	O
the	O
game	O
's	O
source	O
code	O
in	O
2008	O
.	O
</s>
<s>
In	O
2015	O
ported	O
to	O
Linux	B-Application
and	O
the	O
OpenPandora	B-Device
handheld.gravitybone-pandora	O
on	O
github.comH-Craft	O
Championship20072015Racingzlibhttp://www.irrgheist.com/hcraftsource.htm	O
"	O
For	O
the	O
most	O
part	O
H-Craft	B-Application
Championship	I-Application
sources	O
are	O
released	O
under	O
the	O
zlib-license	O
.	O
</s>
<s>
But	O
you	O
can	O
still	O
download	O
the	O
media	O
files	O
and	O
they	O
are	O
free	O
for	O
personal	O
use.3DSci-fi	O
racer	B-Application
for	O
Linux	B-Application
,	O
Windows	O
and	O
Android	O
which	O
is	O
using	O
the	O
Irrlicht	O
engine.Hammerfight20092011physics	O
based	O
combatzliblicense.txt	O
on	O
hg.icculus.org/icculus/hge-unixcommercial2DFor	O
the	O
third	O
Humble	O
Indie	O
BundleHGE-comes-to-Mac-and-Linux-guest-post-from-Ryan-Gordon	O
on	O
wolfire.com	O
(	O
August	O
2011	O
)	O
Ryan	O
C	B-Language
.	O
Gordon	O
ported	O
the	O
underlying	O
game	B-Application
engine	I-Application
,	O
"	O
Haaf	O
's	O
Game	B-Application
Engine	I-Application
"	O
,	O
to	O
Linux	B-Application
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
and	O
released	O
source	O
code	O
under	O
the	O
zlib	O
license.Ryan	O
Gordon	O
Ports	O
HGE	O
To	O
Linux	B-Application
,	O
Then	O
Releases	O
Code	O
on	O
Phoronix	O
by	O
Michael	O
Larabel	O
(	O
August	O
07	O
,	O
2011	O
)	O
hge-unix	O
on	O
icculus.org	O
"	O
August	O
7th	O
,	O
2011	O
:	O
Source	O
code	O
released	O
to	O
the	O
world	O
!	O
</s>
<s>
"	O
Katawa	O
Shoujo20122012Visual	O
NovelMIT	O
license	B-License
(	O
most	O
of	O
game	O
and	O
engine	O
beside	O
some	O
scripts	O
)	O
CC	O
BY-NC-ND2DA	O
visual	O
novel.Narcissu20052005Visual	O
novelGPLFreeware/PFSLnarcissu.txt2DIs	O
a	O
free	O
visual	O
novel	O
by	O
the	O
dōjin	O
group	O
stage-nana	O
,	O
telling	O
the	O
story	O
of	O
a	O
terminally	O
ill	O
young	O
man	O
and	O
woman	O
.	O
</s>
<s>
The	O
English	O
version	O
was	O
made	O
with	O
the	O
ONScripter	O
engine.narcissu	O
on	O
insani.orgosu	O
!	O
20072022Rhythm	O
gameMIT	O
licenseCC	O
BY-NC	O
4.02DOpen-source	O
clone	O
of	O
several	O
games	O
,	O
including	O
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	O
!,	O
Taiko	B-Application
no	I-Application
Tatsujin	I-Application
and	O
beatmania	B-Application
IIDX	I-Application
.	O
</s>
<s>
On	O
August	O
28	O
,	O
2016	O
,	O
an	O
Open-source	B-Application
re-write	O
of	O
the	O
osu	B-Application
!	I-Application
</s>
<s>
It	O
was	O
released	O
under	O
the	B-License
MIT	I-License
License	I-License
on	O
GitHub	B-Application
,	O
assets	O
under	O
CC	O
BY-NC	O
.	O
</s>
<s>
Aims	O
is	O
to	O
make	O
osu	O
!,	O
written	O
in	O
C#	B-Application
with	O
the	O
.NET	B-Application
Framework	I-Application
,	O
available	O
to	O
more	O
platforms	O
and	O
transparent	O
.	O
</s>
<s>
The	O
closed-source	B-Application
stable	O
osu	O
client	O
is	O
still	O
used	O
by	O
the	O
majority	O
of	O
the	O
playerbase	O
,	O
however	O
it	O
is	O
feature	O
locked	O
and	O
the	O
developers	O
aim	O
to	O
deprecate	O
it	O
once	O
osu	O
!	O
lazer	O
gains	O
user	O
acceptance.Overgrowth20082017ActionApache	O
License	B-License
2.0Proprietary3DSource	O
code	O
released	O
on	O
2022	O
,	O
April	O
22	O
.	O
</s>
<s>
PlaneShift20012016MMORPGGPLProprietary3DFree	O
to	O
play	O
MMORPG.OpenJK20032020Third-person	O
shooterGPLv2Proprietary3DSource	O
code	O
was	O
released	O
as	O
GPLv2	B-License
by	O
Raven	O
Software	O
and	O
Activision	O
following	O
the	O
dissolution	O
of	O
Lucas	O
Arts	O
in	O
2013.Steel	O
Storm	O
:	O
Episode	O
I20102010ActionGPLv2CC	O
BY-NC-SA	O
3.0Based	O
on	O
DarkPlaces	O
.	O
</s>
<s>
An	O
indie	O
top-down	O
arcade	O
shooter	O
with	O
single-player	O
,	O
deathmatch	O
,	O
and	O
co-op.Smokin	O
'	O
Guns20092012FPSGPLv2Proprietary3DWestern-themed	O
first-person	O
shooter	O
using	O
the	O
ioquake3	O
engine.Tales	O
of	O
Maj'Eyal20122016RPG/RoguelikeGPL-3	O
.0-or-laterGPL-3.0-or-later	O
,	O
ProprietaryCOPYING-MEDIA	O
on	O
git.net-core.org/tome	O
"	O
All	O
the	O
medias	O
located	O
in	O
all	O
the	O
"	O
/data/gfx	O
"	O
folders	O
are	O
granted	O
to	O
use	O
with	O
the	O
Tales	B-Language
of	I-Language
Maj'Eyal	I-Language
game	O
only	O
.	O
</s>
<s>
(	O
2016	O
)	O
2DDeveloped	O
open-source	B-Application
from	O
the	O
beginning	O
with	O
the	O
own	O
T4E	O
engine	O
,	O
COPYING	O
on	O
git.net-core.org/tome	O
(	O
2016	O
)	O
while	O
the	O
assets	O
are	O
kept	O
proprietary	B-Application
for	O
commercialization	O
on	O
Steam	B-Application
and	O
gog.com.The	O
Dark	O
Mod20092022Stealth	O
gameGPL-3.0-or-laterCC	O
BY-NC-SA3D	O
First	O
person	O
stealth	O
game	O
in	O
the	O
style	O
of	O
the	O
Thief	B-Application
games	O
(	O
1	O
and	O
2	O
)	O
using	O
a	O
modified	O
Id	B-Application
Tech	I-Application
4	I-Application
engineThe	O
Last	O
Eichhof19931993Shoot-	O
'	O
em-up	O
"	O
Do	O
whatever	O
your	O
want	O
"	O
license	B-License
(	O
public	O
domain	O
)	O
beersrc.zip	O
-	O
readme	O
"	O
Do	O
whatever	O
your	O
want	O
"	O
licenseFreeware2D	O
Shoot-	O
'	O
em-up	O
game	O
released	O
for	O
DOS	B-Device
in	O
1993	O
by	O
Swiss	B-Protocol
development	O
group	O
Alpha	O
Helix	O
.	O
</s>
<s>
Source	O
code	O
released	O
in	O
1995.The	O
Ur-Quan	O
Masters20022018Action-adventureGPL-2.0-or-laterCC	O
BY-NC-SA-2.52DSource	O
port	O
of	O
Star	O
Control	O
II.The	O
White	O
Chamber20052006	O
/	O
2013AdventureMIT	O
license	B-License
(	O
Wintermute	B-Application
Engine	I-Application
)	O
/	O
CC	O
BY-NC-SA	O
(	O
game	O
code	O
)	O
CC	O
BY-NC-SA	O
/	O
Freeware2DThe	O
White	O
Chamber	O
and	O
its	O
Wintermute	O
source	O
code	O
have	O
been	O
released	O
under	O
CC	O
BY-NC-SA	O
Creative	O
Commons	O
license.source	O
code	O
at	O
studiotrophis.com	O
That	O
means	O
anyone	O
is	O
free	O
to	O
share	O
and	O
modify	O
the	O
game	O
as	O
long	O
Studio	O
Trophis	O
is	O
credited	O
,	O
it	O
is	O
not	O
for	O
commercial	O
gain	O
and	O
that	O
the	O
result	O
is	O
made	O
available	O
under	O
a	O
similar	O
license	B-License
.	O
</s>
<s>
2013	O
the	O
Wintermute	B-Application
engines	I-Application
source	O
code	O
was	O
released	O
under	O
MIT.TORCS19972016RacingGPLFree	O
Art	O
License	B-License
,	O
Proprietary3DSome	O
car	O
models	O
are	O
non-free	O
,	O
but	O
there	O
is	O
a	O
DFSG-compliant	O
version	O
which	O
does	O
n't	O
include	O
them.Urban	O
Terror20002018FPSGPLProprietary3DMultiplayer	O
tactical	O
shooter	O
based	O
on	O
the	O
id	B-Application
tech	I-Application
3	I-Application
engine.VDrift20052012RacingGPL-3.0-or-laterGPL-3.0-or-later	O
,	O
Proprietary3DSome	O
datas	O
are	O
non-free	O
,	O
for	O
example	O
the	O
"	O
SV	O
"	O
car	O
model	O
,	O
under	O
a	O
CC	O
BY-NC-SA	O
license.Warsow20052017FPSGPL-2.0-or-laterCC	O
BY-SA	O
4.0	O
,	O
CC	O
BY-ND	O
4.03DA	O
fast-paced	O
arena	O
FPS	O
with	O
movement	O
tricks.World	O
of	O
Padman20072008FPSGPLProprietaryOriginally	O
a	O
Quake	B-Application
III	I-Application
modification	O
.	O
</s>
<s>
Became	O
stand-alone	O
in	O
2007	O
,	O
now	O
runs	O
on	O
ioquake3.Zero-K20102021RTSGPL-2.0-or-latervarious	O
,	O
CC	O
BY-NC-ND	O
2.0	O
(	O
sound	O
)	O
3DA	O
multi-platform	O
real	O
time	O
strategy	O
game	O
inspired	O
by	O
Total	B-Application
Annihilation	I-Application
,	O
powered	O
by	O
the	O
Spring	B-Application
game	B-Application
engine	I-Application
.	O
</s>
<s>
Released	O
2018	O
on	O
Steam	B-Application
.	O
</s>
<s>
The	O
video	O
game	O
remakes	O
in	O
this	O
table	O
were	O
developed	O
under	O
an	O
open-source	B-Application
license	B-License
which	O
allows	O
usually	O
the	O
reuse	O
,	O
modification	O
and	O
commercial	O
redistribution	O
of	O
the	O
code	O
.	O
</s>
<s>
is	O
taken	O
from	O
a	O
proprietary	B-Application
and	O
non-opened	O
commercial	O
game	O
,	O
so	O
that	O
the	O
whole	O
game	O
is	O
non-free	O
.	O
</s>
<s>
See	O
also	O
the	O
Game	B-Application
engine	I-Application
recreation	O
page	O
.	O
</s>
<s>
While	O
Arx	B-Application
Fatalis	I-Application
is	O
open-source	B-Application
,	O
the	O
textures	O
and	O
other	O
assets	O
are	O
proprietary	B-Application
content.3DEngine	O
remake	O
of	O
Arx	O
Fatalis.Daggerfall	O
Unity	O
?	O
2022RPGProprietary	O
/MIT	O
License	O
Proprietary	B-Application
.	O
</s>
<s>
It	O
uses	O
proprietary	B-Application
content	O
from	O
Daggerfall.3DEngine	O
remake	O
of	O
The	B-Application
Elder	I-Application
Scrolls	I-Application
II	I-Application
:	O
DaggerfallOpenAge	O
?	O
2021RTSGPL-3.0-or-laterProprietary	O
.	O
</s>
<s>
It	O
uses	O
proprietary	B-Application
content	O
from	O
Age	B-Application
of	I-Application
Empires	I-Application
II2DEngine	O
remake	O
for	O
the	O
classic	O
games	O
in	O
the	O
Age	B-Application
of	I-Application
Empires	I-Application
franchise	O
,	O
in	O
particular	O
Age	B-Application
of	I-Application
Empires	I-Application
II.OpenMW20082021RPGGPL-3.0-or-laterProprietary	O
/	O
CC	O
BY	O
SA	O
(	O
OpenMW	B-Application
Example	O
Suit	O
)	O
3DEngine	O
remake	O
of	O
The	O
Elder	O
Scrolls	O
III	O
:	O
Morrowind.OpenRA20092020RTSGPL-3.0-or-laterProprietary	O
.	O
</s>
<s>
It	O
uses	O
proprietary	B-Application
content	O
from	O
the	O
freeware	B-License
releases	O
of	O
the	O
classic	O
games.2DEngine	O
remake	O
for	O
the	O
classic	O
games	O
in	O
the	O
Command	B-Application
&	I-Application
Conquer	I-Application
franchise	O
,	O
in	O
particular	O
Red	O
Alert.OpenRCT220142021SimulationGPL-3.0-or-laterProprietary	O
.	O
</s>
<s>
It	O
uses	O
proprietary	B-Application
content	O
from	O
Rollercoaster	B-Application
Tycoon	I-Application
2	I-Application
and	O
if	O
chosen	O
the	O
expansion	O
packs	O
as	O
well.2DEngine	O
remake	O
of	O
Rollercoaster	O
Tycoon	O
2OpenXcom20092020TBТGPL-3.0-or-laterProprietary	O
.	O
</s>
<s>
It	O
uses	O
proprietary	B-Application
content	O
from	O
the	O
X-COM	B-Application
:	I-Application
UFO	I-Application
Defense	I-Application
or	O
Terror	B-Application
from	I-Application
the	I-Application
Deep	I-Application
releases	O
of	O
the	O
classic	O
games	O
,	O
which	O
the	O
user	O
needs	O
to	O
have	O
a	O
copy	O
of.2DEngine	O
remake	O
for	O
the	O
classic	O
games	O
in	O
the	O
X-COM	B-Application
franchise	O
,	O
in	O
particular	O
X-COM	B-Application
:	I-Application
UFO	I-Application
Defense	I-Application
.	O
</s>
<s>
Video	O
games	O
in	O
this	O
table	O
are	O
source-available	B-License
,	O
but	O
are	O
neither	O
open-source	B-Application
software	I-Application
according	O
to	O
the	O
OSI	O
definition	O
nor	O
free	B-Application
software	I-Application
according	O
to	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
These	O
games	O
are	O
released	O
under	O
a	O
license	B-License
with	O
limited	O
rights	O
for	O
the	O
user	O
,	O
for	O
example	O
only	O
the	O
rights	O
to	O
read	O
and	O
modify	O
the	O
game	O
's	O
source	O
for	O
personal	O
or	O
educational	O
purposes	O
but	O
no	O
reuse	O
rights	O
beside	O
the	O
game	O
's	O
original	O
context	O
are	O
granted	O
.	O
</s>
<s>
CC	O
BY-NC-SA	O
)	O
,	O
MAME	O
like	O
licenses	O
or	O
several	O
shared	B-License
source	I-License
licenses	I-License
.	O
</s>
<s>
TitleFirst	O
releaseLast	O
releaseGenreEngine	O
licenseContent	O
licenseDimensionsOther	O
informationAlien	O
Swarm20102010Shooter	O
gameNon-commercial	O
usable	O
and	O
shareableAlienSwarm	O
fork	B-Application
on	O
github.com	B-Application
"	O
readme	O
:	O
You	O
may	O
,	O
free	O
of	O
charge	O
,	O
download	O
and	O
use	O
the	O
SDK	O
to	O
develop	O
a	O
modified	O
Valve	O
game	O
running	O
on	O
the	O
Source	B-Application
engine	I-Application
.	O
</s>
<s>
"	O
Freeware3DIn	O
2010	O
Valve	O
released	O
this	O
Source	B-Application
engine	I-Application
based	O
game	O
with	O
source	O
code	O
,	O
which	O
started	O
as	O
a	O
mod.Bugdom19992003PlatformerCC	O
BY-NC-SA	O
4.0CC	O
BY-NC-SA	O
4.03DReleased	O
under	O
a	O
non-commercial	O
license	B-License
in	O
2020.Hero	O
Core20102013Shooter	O
gameNon-commercial	O
,	O
attribution	O
requiredFreeware2DAround	O
2013	O
Daniel	O
Remar	O
released	O
the	O
GameMaker	B-Operating_System
source	O
code	O
of	O
the	O
game	O
,	O
together	O
with	O
the	O
sources	O
of	O
his	O
other	O
games	O
like	O
Iji.resources	O
on	O
remar.se	O
"	O
source	O
code	O
"	O
Flow20062009Life	O
simulation	O
?	O
</s>
<s>
on	O
thatgamecompany.com	O
by	O
Jenova	O
Chen	O
(	O
Sep	O
21	O
,	O
2009	O
)	O
Fortress	O
Forever20072018FPSProprietary3DUnofficial	O
,	O
open-source	B-Application
Source	B-Application
engine	I-Application
successor	O
to	O
Team	O
Fortress	O
Classic.I	O
Wanna	O
Be	O
the	O
Guy20072011Platform	O
gameProprietaryFreeware2DOn	O
November	O
9	O
,	O
2011	O
,	O
the	O
developer	O
Michael	O
"	O
Kayin	O
"	O
O'Reilly	O
released	O
the	O
source	O
code	O
of	O
the	O
game	O
under	O
an	O
own	O
software	B-License
license	I-License
(	O
forbidding	O
new	O
content	O
)	O
DIYGamer	O
:	O
Recursive	O
Romhackery	O
–	O
I	B-Application
Wanna	I-Application
Be	I-Application
The	I-Application
Guy	I-Application
Source	O
Code	O
Released	O
(	O
2011	O
)	O
so	O
that	O
the	O
game	O
's	O
community	O
would	O
be	O
able	O
to	O
create	O
fixes	O
and	O
patches.Jump	O
'	O
n	O
Bump19981999Deathmatch	O
PlatformerEmailwareJump	O
'	O
n	O
Bump	O
readme.txt	O
JUMP	B-Application
'	I-Application
N	I-Application
BUMP	I-Application
by	O
Brainchild	B-Application
Design	I-Application
in	O
1998	O
Jump	B-Application
'	I-Application
n	I-Application
Bump	I-Application
is	O
e-mailware	O
.	O
</s>
<s>
That	O
means	O
you	O
're	O
supposed	O
to	O
send	O
us	O
an	O
e-mail.Emailware2D1998	O
freeware	B-License
DOS	B-Device
platform	O
video	O
game	O
,	O
written	O
in	O
C	B-Language
and	O
Assembly	O
language	O
by	O
Brainchild	B-Application
Design	I-Application
.	O
</s>
<s>
|Only	O
source	O
code	O
of	O
0.5	O
version	O
is	O
available	O
,	O
all	O
other	O
releases	O
are	O
closed	B-Application
source	I-Application
.	O
</s>
<s>
|Many	O
different	O
servers	O
exist	O
each	O
with	O
a	O
different	O
codebase	O
and	O
different	O
license	B-License
.	O
</s>
<s>
|The	O
source	O
code	O
of	O
the	O
2008	O
's	O
Windows	O
freeware	B-License
version	O
was	O
published	O
on	O
December	O
25	O
,	O
2009	O
,	O
under	O
a	O
software	B-License
license	I-License
permitting	O
noncommercial	O
distribution	O
and	O
modification	O
.	O
</s>
<s>
Based	O
on	O
this	O
source	O
code	O
the	O
game	O
community	O
created	O
a	O
community	O
patch	O
which	O
added	O
support	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
|VVVVVV''20102020PlatformerAttribution	O
requiredProprietary2DOn	O
the	O
10th	O
anniversary	O
of	O
the	O
game	O
's	O
release	O
in	O
January	O
2020	O
,	O
developer	O
Terry	O
Cavanagh	O
made	O
its	O
source	O
code	O
publicly	O
available	O
on	O
GitHub	B-Application
.	O
</s>
<s>
For	O
games	O
that	O
were	O
originally	O
developed	O
proprietary	B-Application
as	O
commercial	O
closed	B-Application
source	I-Application
product	O
,	O
see	O
also	O
:Category:Commercial	O
video	O
games	O
with	O
freely	O
available	O
source	O
code	O
.	O
</s>
