<s>
OpenArena	B-Application
is	O
a	O
free	B-Application
and	O
open-source	B-Application
video	I-Application
game	I-Application
.	O
</s>
<s>
It	O
is	O
a	O
first-person	O
shooter	O
,	O
and	O
a	O
video	O
game	O
clone	O
of	O
Quake	B-Application
III	I-Application
Arena	I-Application
.	O
</s>
<s>
The	O
OpenArena	B-Application
project	O
was	O
established	O
on	O
August	O
19	O
,	O
2005	O
,	O
one	O
day	O
after	O
the	O
id	B-Application
Tech	I-Application
3	I-Application
source	O
code	O
released	O
under	O
GNU	B-License
GPL-2.0-or-later	I-License
license	B-License
.	O
</s>
<s>
OpenArena	B-Application
was	O
officially	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
,	O
and	O
macOS	B-Application
.	O
</s>
<s>
Third	O
parties	O
have	O
also	O
ported	O
the	O
game	O
to	O
FreeBSD	B-Operating_System
,	O
OpenBSD	B-Operating_System
,	O
Android	B-Application
and	O
iOS	B-Application
.	O
</s>
<s>
The	O
game	O
was	O
also	O
unofficially	O
ported	O
to	O
the	O
Raspberry	B-Operating_System
Pi	I-Operating_System
.	O
</s>
<s>
OpenArena'''s	O
gameplay	O
mirrors	O
that	O
of	O
Quake	O
III	O
Arena''	O
with	O
some	O
quality	O
of	O
life	O
improvements	O
,	O
such	O
as	O
awarding	O
a	O
character	O
points	O
for	O
pushing	O
another	O
character	O
to	O
their	O
death	O
.	O
</s>
<s>
OpenArena	B-Application
has	O
the	O
following	O
gamemodes	O
:	O
</s>
<s>
Free	B-Application
For	O
All	O
:	O
classic	O
Deathmatch	O
where	O
players	O
are	O
all	O
pitted	O
against	O
each	O
other	O
and	O
the	O
player	O
who	O
has	O
the	O
highest	O
score	O
at	O
the	O
end	O
of	O
the	O
match	O
wins	O
.	O
</s>
<s>
Team	O
Deathmatch	O
:	O
a	O
team-based	O
variation	O
of	O
Free	B-Application
For	O
All	O
,	O
with	O
two	O
teams	O
of	O
players	O
being	O
pitted	O
against	O
the	O
other	O
.	O
</s>
<s>
The	O
game	O
is	O
one	O
of	O
the	O
most	O
popular	O
open-source	B-Application
first-person	I-Application
shooters	I-Application
,	O
particularly	O
among	O
fans	O
of	O
the	O
original	O
Quake	B-Application
III	I-Application
.	O
</s>
<s>
OpenArena	B-Application
has	O
been	O
criticized	O
to	O
be	O
incomplete	O
,	O
with	O
some	O
saying	O
that	O
this	O
detracts	O
from	O
long	O
term	O
play	O
.	O
</s>
<s>
OpenArena	B-Application
has	O
been	O
used	O
as	O
a	O
platform	O
for	O
scholarly	O
work	O
in	O
computer	O
science	O
.	O
</s>
