<s>
Combat	B-Application
Mission	I-Application
:	I-Application
Shock	I-Application
Force	I-Application
is	O
a	O
computer	B-Application
wargame	I-Application
by	O
American	O
studio	O
Battlefront.com	O
in	O
the	O
Combat	B-Application
Mission	I-Application
series	O
of	O
games	O
that	O
covers	O
a	O
fictional	O
United	O
States	O
invasion	O
of	O
Syria	O
,	O
focusing	O
on	O
U.S.	O
Stryker	O
brigades	O
.	O
</s>
<s>
It	O
was	O
released	O
in	O
2007	O
,	O
marking	O
the	O
debut	O
of	O
the	O
CMX2	B-Application
game	O
engine	O
,	O
the	O
second	O
generation	O
of	O
Combat	B-Application
Mission	I-Application
games	I-Application
.	O
</s>
<s>
This	O
is	O
the	O
original	O
incarnation	O
of	O
com	O
's	O
Combat	B-Application
Mission	I-Application
series	O
using	O
the	O
new	O
CMX2	B-Application
game	O
engine	O
.	O
</s>
<s>
The	O
game	O
received	O
"	O
mixed	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
GameSpot	O
's	O
review	O
started	O
with	O
the	O
tag	O
line	O
"	O
Combat	B-Application
Mission	I-Application
says	O
good-bye	O
to	O
WWII	O
,	O
but	O
hello	O
to	O
an	O
inept	O
interface	O
,	O
broken	O
AI	O
,	O
and	O
hideous	O
visuals.	O
"	O
</s>
<s>
An	O
expansion	O
,	O
called	O
Combat	B-Application
Mission	I-Application
:	I-Application
Shock	I-Application
Force	I-Application
-	O
Marines	O
,	O
was	O
released	O
in	O
September	O
2008	O
and	O
marketed	O
by	O
direct	O
sale	O
through	O
Battlefront	O
's	O
website	O
,	O
requiring	O
Combat	B-Application
Mission	I-Application
:	I-Application
Shock	I-Application
Force	I-Application
to	O
play	O
.	O
</s>
