<s>
Tread	B-Application
Marks	I-Application
is	O
a	O
3D	O
,	O
third-person	O
perspective	O
,	O
multiplayer-focused	O
tank	O
combat	O
and	O
racing	O
computer	O
game	O
developed	O
by	O
Independent	O
video	O
game	O
developer	O
Longbow	O
Digital	O
Arts	O
.	O
</s>
<s>
Capture	B-Application
the	I-Application
Flag	I-Application
mode	O
(	O
CTF	B-Application
)	O
in	O
which	O
there	O
are	O
two	O
or	O
more	O
teams	O
of	O
tanks	O
that	O
compete	O
by	O
trying	O
to	O
capture	O
one	O
of	O
the	O
other	O
team	O
's	O
flags	O
.	O
</s>
<s>
Tread	B-Application
Marks	I-Application
can	O
be	O
played	O
over	O
a	O
LAN	B-General_Concept
,	O
or	O
over	O
the	O
Internet	O
and	O
includes	O
a	O
program	O
for	O
running	O
a	O
dedicated	O
game	O
server	B-Application
,	O
which	O
lists	O
the	O
computer	O
it	O
runs	O
from	O
on	O
the	O
master	B-Application
server	I-Application
.	O
</s>
<s>
The	O
master	B-Application
server	I-Application
in	O
turn	O
is	O
operated	O
by	O
Longbow	O
Digital	O
Arts	O
from	O
a	O
location	O
in	O
Toronto	O
,	O
Ontario	B-Architecture
,	O
Canada	O
.	O
</s>
<s>
The	O
game	O
was	O
developed	O
by	O
Seumas	O
McNally	O
and	O
uses	O
OpenGL	B-Application
to	O
render	O
its	O
3D	O
graphics	O
and	O
the	O
Miles	B-Library
Sound	I-Library
System	I-Library
for	O
positional	O
sound	O
.	O
</s>
<s>
For	O
the	O
in-game	O
deformable	O
terrain	O
a	O
Binary-Triangle	O
Tree-based	O
dynamic	O
view	O
dependent	O
level	O
of	O
detail	O
height	B-Data_Structure
field	I-Data_Structure
renderer	O
was	O
utilized	O
.	O
</s>
<s>
On	O
January	O
20	O
,	O
2017	O
the	O
game	O
was	O
released	O
as	O
freeware	B-License
and	O
the	O
source	O
code	O
as	O
open-source	B-Application
under	O
the	O
GPLv3	O
license	O
on	O
GitHub	B-Application
.	O
</s>
<s>
For	O
enhanced	O
cross	B-Operating_System
platform	I-Operating_System
portability	O
,	O
the	O
Miles	B-Library
Sound	I-Library
System	I-Library
was	O
replaced	O
with	O
OpenAL	B-Application
,	O
and	O
the	O
platform	B-Operating_System
dependent	I-Operating_System
Win32	B-Library
API	I-Library
code	O
with	O
SFML	B-Language
and	O
Qt	B-Language
.	O
</s>
<s>
In	O
September	O
2017	O
a	O
version	O
for	O
the	O
Linux-based	O
OpenPandora	B-Device
was	O
released	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
release	O
,	O
the	O
game	O
received	O
above-average	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
GameRankings	O
.	O
</s>
