<s>
Red	B-Application
Orchestra	I-Application
:	I-Application
Ostfront	I-Application
41-45	I-Application
is	O
a	O
tactical	O
first-person	O
shooter	O
video	O
game	O
based	O
on	O
its	O
predecessor	O
Red	B-Application
Orchestra	I-Application
:	O
Combined	B-Protocol
Arms	I-Protocol
.	O
</s>
<s>
After	O
winning	O
the	O
Make	O
Something	O
Unreal	O
contest	O
,	O
the	O
team	O
behind	O
the	O
original	O
Red	B-Application
Orchestra	I-Application
started	O
the	O
game	O
studio	O
Tripwire	O
Interactive	O
and	O
developed	O
Red	B-Application
Orchestra	I-Application
:	I-Application
Ostfront	I-Application
41-45	I-Application
as	O
their	O
first	O
project	O
.	O
</s>
<s>
Set	O
on	O
the	O
Eastern	O
Front	O
during	O
World	O
War	O
II	O
between	O
1941	O
and	O
1945	O
,	O
Red	B-Application
Orchestra	I-Application
:	I-Application
Ostfront	I-Application
41-45	I-Application
depicts	O
the	O
struggle	O
between	O
Soviet	O
and	O
German	O
forces	O
.	O
</s>
<s>
The	O
game	O
's	O
creators	O
,	O
Tripwire	O
Interactive	O
,	O
developed	O
the	O
game	O
out	O
of	O
the	O
previous	O
Unreal	B-Application
Tournament	I-Application
2004	I-Application
mod	O
,	O
Red	B-Application
Orchestra	I-Application
:	O
Combined	B-Protocol
Arms	I-Protocol
.	O
</s>
<s>
Red	B-Application
Orchestra	I-Application
concentrates	O
mostly	O
on	O
the	O
multiplayer	O
aspect	O
of	O
the	O
game	O
,	O
although	O
there	O
is	O
a	O
singleplayer	O
"	O
Practice	O
"	O
mode	O
available	O
.	O
</s>
<s>
Red	B-Application
Orchestra	I-Application
:	I-Application
Ostfront	I-Application
41-45	I-Application
features	O
an	O
advanced	O
ballistics	O
system	O
for	O
both	O
small	O
arms	O
and	O
tank	O
rounds	O
-	O
incorporating	O
bullet	O
drop	O
,	O
flight	O
time	O
,	O
and	O
tanks	O
with	O
more	O
realistic	O
armor	O
properties	O
than	O
most	O
games	O
(	O
featuring	O
:	O
penetration	O
and	O
deflection	O
,	O
in	O
relation	O
to	O
range	O
and	O
projectile	O
trajectory	O
angle	O
)	O
.	O
</s>
<s>
Red	B-Application
Orchestra	I-Application
is	O
notable	O
for	O
its	O
emphasis	O
on	O
realism	O
in	O
comparison	O
to	O
other	O
World	O
War	O
II-based	O
FPS	O
games	O
.	O
</s>
<s>
Red	B-Application
Orchestra	I-Application
features	O
16	O
official	O
maps	O
and	O
10	O
community-made	O
maps	O
supported	O
by	O
the	O
developers	O
.	O
</s>
<s>
The	O
Red	B-Application
Orchestra	I-Application
SDK	O
,	O
though	O
never	O
gone	O
beyond	O
beta	O
version	O
,	O
has	O
allowed	O
the	O
production	O
of	O
hundreds	O
of	O
user-created	O
maps	O
.	O
</s>
<s>
Red	B-Application
Orchestra	I-Application
features	O
several	O
different	O
map	O
types	O
.	O
</s>
<s>
Infantry	B-Protocol
maps	O
focus	O
on	O
infantry	B-Protocol
combat	O
,	O
but	O
can	O
occasionally	O
include	O
APCs	O
.	O
</s>
<s>
Combined	B-Protocol
Arms	I-Protocol
features	O
gameplay	O
which	O
makes	O
the	O
coordination	O
of	O
infantry	B-Protocol
and	O
armor	O
its	O
focal	O
point	O
.	O
</s>
<s>
Red	B-Application
Orchestra	I-Application
:	O
Combined	B-Protocol
Arms	I-Protocol
is	O
a	O
tactical	O
first-person	O
shooter	O
total	O
conversion	O
for	O
Unreal	B-Application
Tournament	I-Application
2004	I-Application
and	O
previously	O
for	O
Unreal	B-Application
Tournament	I-Application
2003	I-Application
originally	O
developed	O
by	O
an	O
independent	O
international	O
mod	O
team	O
,	O
set	O
on	O
the	O
Eastern	O
Front	O
during	O
World	O
War	O
II	O
.	O
</s>
<s>
The	O
Red	B-Application
Orchestra	I-Application
developers	O
,	O
Tripwire	O
Interactive	O
,	O
entered	O
the	O
NVIDIA	O
Make	O
Something	O
Unreal	O
Contest	O
,	O
with	O
a	O
grand	O
prize	O
of	O
free	O
Unreal	B-Operating_System
Engine	I-Operating_System
2.5	O
and	O
3.0	O
licenses	O
.	O
</s>
<s>
The	O
Combined	B-Protocol
Arms	I-Protocol
aspect	O
of	O
the	O
game	O
in	O
version	O
3.0	O
was	O
brought	O
about	O
by	O
heavy	O
suggestion	O
that	O
vehicles	O
should	O
be	O
included	O
to	O
secure	O
progression	O
in	O
the	O
MSUC	O
.	O
</s>
<s>
Further	O
refinement	O
of	O
the	O
Red	B-Application
Orchestra	I-Application
total	O
conversion	O
led	O
to	O
version	O
3.3	O
,	O
the	O
last	O
version	O
of	O
the	O
mod	O
.	O
</s>
<s>
On	O
Monday	O
21	O
November	O
2005	O
Tripwire	O
Interactive	O
announced	O
that	O
they	O
would	O
be	O
releasing	O
Red	B-Application
Orchestra	I-Application
:	I-Application
Ostfront	I-Application
41-45	I-Application
over	O
Steam	B-Application
,	O
Valve	O
's	O
digital	O
content	O
distribution	O
platform	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
Tuesday	O
14	O
March	O
2006	O
on	O
the	O
Steam	B-Application
network	O
.	O
</s>
<s>
Loki	O
installers	O
for	O
Linux	B-Application
gamers	O
supplies	O
a	O
Linux	B-Application
installer	O
for	O
the	O
original	O
Red	B-Application
Orchestra	I-Application
:	O
Combined	B-Protocol
Arms	I-Protocol
modification	O
.	O
</s>
<s>
It	O
is	O
made	O
to	O
work	O
with	O
the	O
Linux	B-Application
port	O
of	O
Unreal	B-Application
Tournament	I-Application
2004	I-Application
,	O
and	O
has	O
an	O
installer	O
for	O
both	O
the	O
original	O
mod	O
and	O
the	O
Summer	O
Offensive	O
Map	O
Pack	O
Addon	O
.	O
</s>
<s>
The	O
player	O
must	O
also	O
mentally	O
keep	O
track	O
of	O
ammo	O
usage	O
,	O
unlike	O
in	O
games	O
such	O
as	O
Counter-Strike	B-Application
which	O
use	O
an	O
ammunition	O
counter	O
.	O
</s>
<s>
The	O
PC	O
version	O
received	O
"	O
favorable	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
Red	B-Application
Orchestra	I-Application
won	O
Computer	O
Games	O
Magazines	O
2004	O
"	O
Best	O
Mod	O
"	O
award	O
.	O
</s>
<s>
Tripwire	O
Interactive	O
released	O
Red	B-Application
Orchestra	I-Application
2	I-Application
:	I-Application
Heroes	I-Application
of	I-Application
Stalingrad	I-Application
in	O
September	O
2011	O
.	O
</s>
