<s>
Stratagus	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
cross-platform	B-Operating_System
game	O
engine	O
used	O
to	O
build	O
real-time	O
strategy	O
video	O
games	O
.	O
</s>
<s>
Licensed	O
under	O
the	O
GNU	B-License
GPL-2.0-only	I-License
,	O
it	O
is	O
written	O
mostly	O
in	O
C++	B-Language
with	O
the	O
configuration	O
language	O
being	O
Lua	B-Language
.	O
</s>
<s>
On	O
June	O
15	O
,	O
1998	O
Lutz	O
Sammer	O
released	O
the	O
first	O
public	O
version	O
of	O
a	O
free	O
Warcraft	B-Application
II	O
clone	O
for	O
Linux	B-Application
he	O
had	O
written	O
,	O
named	O
ALE	B-Application
Clone	I-Application
.	O
</s>
<s>
In	O
1999	O
it	O
was	O
renamed	O
to	O
Freecraft	B-Application
.	O
</s>
<s>
In	O
June	O
2003	O
,	O
a	O
cease	O
and	O
desist	O
letter	O
was	O
received	O
from	O
Blizzard	O
Entertainment	O
,	O
who	O
thought	O
the	O
name	O
Freecraft	B-Application
could	O
cause	O
confusion	O
with	O
the	O
names	O
StarCraft	B-Application
and	O
Warcraft	B-Application
,	O
and	O
that	O
some	O
of	O
the	O
ideas	O
within	O
the	O
engine	O
were	O
too	O
similar	O
to	O
Warcraft	B-Application
II	O
.	O
</s>
<s>
The	O
developers	O
regrouped	O
in	O
2004	O
to	O
continue	O
work	O
on	O
the	O
project	O
,	O
renaming	O
it	O
Stratagus	B-Application
.	O
</s>
<s>
Their	O
focus	O
changed	O
from	O
cloning	O
Warcraft	B-Application
II	O
to	O
creating	O
an	O
open	O
source	O
,	O
configurable	O
engine	O
for	O
RTS	O
games	O
including	O
support	O
for	O
playing	O
over	O
Internet/LAN	O
or	O
playing	O
vs.	O
computer	O
opponents	O
.	O
</s>
<s>
A	O
separate	O
project	O
,	O
Wargus	B-Application
,	O
was	O
started	O
to	O
get	O
Warcraft	B-Application
II	O
data	O
files	O
running	O
in	O
the	O
Stratagus	B-Application
engine	O
.	O
</s>
<s>
This	O
mod	O
requires	O
a	O
legal	O
copy	O
of	O
Warcraft	B-Application
II	O
and	O
allows	O
for	O
cross-platform	B-Operating_System
support	O
such	O
as	O
Linux	B-Application
and	O
other	O
operating	O
systems	O
.	O
</s>
<s>
The	O
free	O
media	O
set	O
imitating	O
Warcraft	B-Application
II	O
was	O
discontinued	O
.	O
</s>
<s>
On	O
June	O
10	O
,	O
2007	O
,	O
development	O
of	O
Stratagus	B-Application
was	O
paused	O
.	O
</s>
<s>
The	O
Stratagus	B-Application
developers	O
began	O
working	O
on	O
Bos	B-Language
Wars	I-Language
,	O
which	O
uses	O
its	O
own	O
modified	B-Application
version	I-Application
of	O
the	O
Stratagus	B-Application
engine	O
.	O
</s>
<s>
In	O
June	O
2010	O
some	O
of	O
the	O
developers	O
moved	O
Stratagus	B-Application
project	O
from	O
SourceForge	B-Application
to	O
Launchpad	B-Protocol
and	O
started	O
working	O
on	O
Stratagus	B-Application
and	O
games	O
again	O
.	O
</s>
<s>
Wargus	B-Application
(	O
for	O
Warcraft	B-Application
II	O
)	O
,	O
War1gus	O
(	O
for	O
Warcraft	B-Application
I	I-Application
)	O
and	O
Stargus	O
(	O
for	O
Starcraft	B-Application
)	O
continued	O
to	O
be	O
developed	O
by	O
the	O
Stratagus	B-Application
team	O
on	O
Launchpad	B-Protocol
.	O
</s>
<s>
In	O
2014	O
,	O
Wyrmgus	O
started	O
as	O
a	O
fork	B-Application
from	O
the	O
Stratagus	B-Application
engine	O
to	O
develop	O
a	O
strategy	O
game	O
based	O
on	O
free	O
assets	O
with	O
a	O
wider	O
scope	O
than	O
the	O
original	O
engine	O
allowed	O
.	O
</s>
<s>
The	O
Stratagus	B-Application
team	O
has	O
since	O
also	O
moved	O
to	O
GitHub	B-Application
.	O
</s>
<s>
Playable	O
Stratagus-based	O
games	O
are	O
:	O
fantasy	O
Aleona	O
's	O
Tales	O
,	O
medieval	O
Battle	O
for	O
Mandicor	O
,	O
Warcraft	B-Application
II	O
:	O
Tides	O
of	O
Darkness	O
(	O
plus	O
expansion	O
Beyond	O
the	O
Dark	O
Portal	O
)	O
port	O
Wargus	B-Application
,	O
Warcraft	B-Application
:	I-Application
Orcs	I-Application
and	I-Application
Humans	I-Application
port	O
War1gus	O
,	O
futuristic	O
Battle	B-Language
of	I-Language
Survival	I-Language
,	O
historically-inspired	O
Commander	O
Stalin	B-Application
,	O
StarCraft	B-Application
port	O
Stargus	O
,	O
and	O
space	O
age	O
Astroseries	O
.	O
</s>
<s>
Of	O
these	O
,	O
only	O
Aleona	O
's	O
Tales	O
,	O
Wargus	B-Application
,	O
War1gus	O
,	O
and	O
Wyrmsun	O
are	O
complete	O
.	O
</s>
<s>
The	O
Stratagus	B-Application
engine	O
is	O
a	O
2D	O
engine	O
based	O
on	O
cross-platform	B-Operating_System
open-source	B-Application
libraries	B-Library
like	O
SDL	B-Operating_System
,	O
gzip	B-Application
,	O
bzip2	B-Application
and	O
others	O
.	O
</s>
<s>
Basing	O
on	O
Lua	B-Language
as	O
their	O
primary	O
scripting	B-Language
language	I-Language
,	O
virtually	O
all	O
the	O
abilities	O
in	O
the	O
engine	O
have	O
been	O
made	O
available	O
to	O
the	O
users	O
of	O
Stratagus	B-Application
for	O
easy	O
modding	O
,	O
removing	O
the	O
need	O
to	O
change	O
the	O
original	O
C/C	O
++	O
source	O
.	O
</s>
<s>
Animations	O
are	O
created	O
from	O
a	O
set	O
of	O
.png	O
pictures	O
;	O
this	O
technique	O
was	O
commonly	O
used	O
in	O
the	O
time	O
that	O
Warcraft	B-Application
and	O
other	O
RTS	O
had	O
come	O
out	O
.	O
</s>
<s>
Stratagus	B-Application
and	O
Wargus	B-Application
have	O
been	O
ported	O
to	O
run	O
on	O
Pocket	B-Device
PC	I-Device
,	O
Symbian	B-Operating_System
and	O
Android	B-Application
devices	O
.	O
</s>
<s>
Wargus	B-Application
has	O
also	O
been	O
ported	O
to	O
the	O
GP2X	B-Device
and	O
Open	B-Device
Pandora	I-Device
Linux	B-Application
handhelds	O
.	O
</s>
<s>
Stratagus	B-Application
was	O
downloaded	O
from	O
SourceForge.net	B-Application
between	O
2004	O
and	O
June	O
2017	O
over	O
185,000	O
times	O
.	O
</s>
