<s>
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
is	O
a	O
2005	O
first-person	O
shooter	O
video	O
game	O
developed	O
by	O
Infinity	O
Ward	O
and	O
published	O
by	O
Activision	O
in	O
most	O
regions	O
of	O
the	O
world	O
.	O
</s>
<s>
It	O
is	O
the	O
second	O
installment	O
of	O
the	O
Call	B-Application
of	I-Application
Duty	I-Application
series	O
.	O
</s>
<s>
Announced	O
by	O
Activision	O
on	O
April	O
7	O
,	O
2005	O
,	O
the	O
game	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
on	O
October	O
25	O
,	O
2005	O
,	O
and	O
as	O
a	O
launch	O
title	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
on	O
November	O
22	O
,	O
2005	O
.	O
</s>
<s>
Other	O
versions	O
were	O
eventually	O
released	O
for	O
OS	B-Application
X	I-Application
,	O
mobile	B-Application
phones	O
,	O
and	O
Pocket	B-Device
PCs	I-Device
.	O
</s>
<s>
Many	O
features	O
were	O
added	O
and	O
changed	O
from	O
the	O
original	O
Call	B-Application
of	I-Application
Duty	I-Application
,	O
notably	O
regenerating	O
health	O
and	O
an	O
icon	O
that	O
indicates	O
a	O
nearby	O
grenade	O
about	O
to	O
explode	O
.	O
</s>
<s>
The	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
sold	O
more	O
than	O
250,000	O
copies	O
in	O
its	O
first	O
week	O
,	O
more	O
than	O
2	O
million	O
copies	O
by	O
January	O
2008	O
,	O
and	O
nearly	O
6	O
million	O
copies	O
by	O
November	O
2013	O
.	O
</s>
<s>
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
is	O
a	O
first-person	O
shooter	O
that	O
has	O
a	O
single-player	O
story	O
mode	O
and	O
a	O
multiplayer	O
mode	O
.	O
</s>
<s>
A	O
compass	B-Language
on	O
the	O
heads-up	O
display	O
(	O
HUD	O
)	O
shows	O
allies	O
,	O
enemies	O
,	O
and	O
markers	O
that	O
indicate	O
locations	O
the	O
player	O
must	O
reach	O
,	O
areas	O
to	O
defend	O
,	O
or	O
enemy	O
cannons	O
or	O
tanks	O
that	O
the	O
player	O
must	O
plant	O
explosives	O
on	O
to	O
disable	O
.	O
</s>
<s>
Generally	O
ignored	O
during	O
infantry-centric	O
missions	O
,	O
they	O
are	O
useful	O
for	O
scouting	O
and	O
vital	O
to	O
the	O
long-range	O
use	O
of	O
the	O
Crusader	O
tanks	O
and	O
a	O
mission	O
in	O
which	O
the	O
player	O
must	O
direct	O
artillery	B-Application
fire	O
to	O
defend	O
a	O
town	O
.	O
</s>
<s>
In	O
April	O
2006	O
,	O
Infinity	O
Ward	O
released	O
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
Radiant	B-Application
,	O
which	O
allows	O
a	O
player	O
to	O
create	O
their	O
own	O
multiplayer	O
or	O
single-player	O
maps	O
.	O
</s>
<s>
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
contains	O
three	O
individual	O
campaigns	O
,	O
fought	O
in	O
the	O
roles	O
of	O
four	O
World	O
War	O
II	O
soldiers	O
,	O
for	O
a	O
total	O
of	O
27	O
missions	O
.	O
</s>
<s>
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
features	O
several	O
game	O
types	O
:	O
Deathmatch	O
,	O
Team	O
Deathmatch	O
,	O
Search	O
&	O
Destroy	O
,	O
Capture	O
the	O
Flag	O
and	O
Headquarters	O
.	O
</s>
<s>
Each	O
PC	O
multiplayer	O
server	O
can	O
hold	O
a	O
maximum	O
of	O
64	O
players	O
,	O
while	O
the	O
limit	O
is	O
eight	O
players	O
on	O
Xbox	B-Operating_System
.	O
</s>
<s>
In	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
,	O
players	O
can	O
play	O
on	O
Xbox	B-Application
Live	I-Application
and	O
get	O
new	O
map	O
packs	O
.	O
</s>
<s>
There	O
are	O
13	O
official	O
maps	O
,	O
including	O
three	O
remakes	O
from	O
the	O
original	O
Call	B-Application
of	I-Application
Duty	I-Application
.	O
</s>
<s>
The	O
next	O
level	O
has	O
the	O
player	O
defending	O
a	O
town	O
from	O
overwhelming	O
numbers	O
of	O
Germans	O
sending	O
counter	O
attacks	O
from	O
North	O
,	O
West	O
,	O
South	O
and	O
East	O
;	O
finally	O
achieving	O
victory	O
by	O
destroying	O
much	O
of	O
the	O
German	O
tank	O
force	O
using	O
artillery	B-Application
.	O
</s>
<s>
As	O
Corporal	O
Bill	O
Taylor	O
of	O
the	O
2nd	O
Ranger	O
Battalion	O
,	O
the	O
player	O
starts	O
off	O
by	O
playing	O
a	O
part	O
in	O
D-Day	O
,	O
at	O
the	O
assault	O
of	O
Pointe	O
du	O
Hoc	O
,	O
to	O
destroy	O
a	O
German	O
artillery	B-Application
battery	O
,	O
and	O
hold	O
it	O
against	O
a	O
massive	O
German	O
counter-offensive	O
in	O
the	O
following	O
mission	O
.	O
</s>
<s>
The	O
second	O
objective	O
is	O
focused	O
on	O
Hill	O
400	O
,	O
involving	O
the	O
capture	O
of	O
Bergstein	O
,	O
a	O
disastrous	O
charge	O
at	O
Hill	O
400	O
's	O
bunkers	O
and	O
the	O
defense	O
against	O
the	O
German	O
counterattack	O
,	O
with	O
the	O
player	O
again	O
performing	O
sniper	O
work	O
against	O
German	O
mortar	O
teams	O
,	O
destroying	O
enemy	O
armor	O
,	O
and	O
generally	O
holding	O
the	O
hill	O
against	O
a	O
massive	O
counter-attack	O
,	O
all	O
the	O
while	O
burdened	O
by	O
artillery	B-Application
and	O
overwhelming	O
numbers	O
of	O
German	O
Blue	O
Division	O
soldiers	O
.	O
</s>
<s>
After	O
the	O
credits	O
end	O
,	O
the	O
words	O
"	O
No	O
cows	O
were	O
harmed	O
in	O
the	O
making	O
of	O
this	O
game	O
"	O
appear	O
,	O
as	O
in	O
the	O
original	O
Call	B-Application
of	I-Application
Duty	I-Application
.	O
</s>
<s>
On	O
April	O
7	O
,	O
2005	O
,	O
Activision	O
announced	O
that	O
Infinity	O
Ward	O
was	O
developing	O
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
,	O
set	O
for	O
release	O
in	O
fall	O
2005	O
for	O
PC	O
.	O
</s>
<s>
It	O
had	O
been	O
speculated	O
that	O
Infinity	O
Ward	O
was	O
developing	O
the	O
sequel	O
at	O
the	O
same	O
time	O
as	O
Gray	O
Matter	O
Studios	O
developed	O
Call	B-Application
of	I-Application
Duty	I-Application
:	I-Application
United	I-Application
Offensive	I-Application
.	O
</s>
<s>
The	O
press	O
release	O
said	O
players	O
would	O
engage	O
enemies	O
in	O
a	O
less	O
linear	O
battlefield	O
,	O
tackle	O
the	O
major	O
battles	O
chronologically	O
,	O
and	O
use	O
squad	O
tactics	O
not	O
available	O
in	O
previous	O
Call	B-Application
of	I-Application
Duty	I-Application
games	O
.	O
</s>
<s>
Infinity	O
Ward	O
also	O
confirmed	O
making	O
a	O
"	O
Battle	O
Chatter	O
System	O
"	O
,	O
similar	O
to	O
Medal	B-Application
of	I-Application
Honor	I-Application
:	I-Application
Pacific	I-Application
Assault	I-Application
,	O
where	O
squad	O
members	O
converse	O
to	O
create	O
situational	O
awareness	O
.	O
</s>
<s>
The	O
game	O
engine	O
—	O
proprietary	O
IW	B-Application
engine	I-Application
2.0	O
—	O
is	O
a	O
modified	O
version	O
of	O
id	B-Application
Tech	I-Application
3	I-Application
,	O
which	O
was	O
used	O
in	O
the	O
first	O
Call	B-Application
of	I-Application
Duty	I-Application
game	O
.	O
</s>
<s>
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
was	O
going	O
to	O
be	O
more	O
immersive	O
than	O
the	O
original	O
Call	B-Application
of	I-Application
Duty	I-Application
.	O
</s>
<s>
Vince	O
Zampella	O
,	O
creative	O
director	O
of	O
Infinity	O
Ward	O
,	O
said	O
,	O
"	O
We	O
did	O
n't	O
want	O
to	O
take	O
any	O
of	O
the	O
parts	O
out	O
that	O
made	O
Call	B-Application
of	I-Application
Duty	I-Application
so	O
good	O
.	O
</s>
<s>
A	O
demo	O
of	O
the	O
game	O
showed	O
a	O
more	O
open	O
gameplay	O
style	O
and	O
a	O
better	O
AI	B-Application
for	O
the	O
enemies	O
,	O
who	O
would	O
actively	O
go	O
after	O
the	O
player	O
.	O
</s>
<s>
The	O
game	O
was	O
showcased	O
in	O
E3	O
in	O
2005	O
and	O
was	O
announced	O
as	O
a	O
launch	O
title	O
for	O
the	O
upcoming	O
Xbox	B-Operating_System
360	I-Operating_System
.	O
</s>
<s>
Despite	O
being	O
first	O
on	O
the	O
new	O
Xbox	B-Operating_System
360	I-Operating_System
platform	O
,	O
the	O
game	O
was	O
developed	O
with	O
no	O
mandatory	O
overtime	O
or	O
weekend	O
work	O
.	O
</s>
<s>
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
received	O
"	O
generally	O
positive	O
"	O
reviews	O
,	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
<s>
For	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
,	O
IGN	O
's	O
Douglass	O
C	O
.	O
Perry	O
described	O
the	O
presentation	O
as	O
"	O
classy	O
and	O
well-produced	O
"	O
,	O
and	O
said	O
the	O
graphics	O
were	O
some	O
of	O
the	O
best	O
on	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
at	O
its	O
launch	O
.	O
</s>
<s>
GameSpot	O
reviewer	O
Bob	O
Colayco	O
summarized	O
his	O
review	O
by	O
stating	O
that	O
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
has	O
"	O
smooth	O
,	O
detailed	O
graphics	O
and	O
great	O
sound	O
"	O
,	O
as	O
well	O
as	O
praising	O
the	B-Application
artificial	I-Application
intelligence	I-Application
,	O
realism	O
,	O
and	O
variety	O
in	O
the	O
campaign	O
.	O
</s>
<s>
Thanks	O
to	O
a	O
combination	O
of	O
sharp	O
visuals	O
,	O
teeth-rattling	O
sound	O
effects	O
,	O
and	O
tricky	O
enemy	O
AI	B-Application
,	O
you	O
'll	O
be	O
on	O
the	O
edge	O
of	O
your	O
seat	O
from	O
the	O
moment	O
you	O
're	O
dropped	O
into	O
combat	O
until	O
your	O
dying	O
breath	O
"	O
.	O
</s>
<s>
He	O
also	O
said	O
the	O
graphics	O
did	O
not	O
suffer	O
"	O
from	O
also	O
being	O
developed	O
for	O
the	O
360	B-Operating_System
"	O
.	O
</s>
<s>
Bob	O
Colayco	O
of	O
GameSpot	O
also	O
reviewed	O
the	O
PC	O
version	O
of	O
the	O
game	O
,	O
as	O
he	O
did	O
its	O
Xbox	B-Operating_System
360	I-Operating_System
counterpart	O
.	O
</s>
<s>
Colayco	O
again	O
commended	O
the	O
sound	O
,	O
calling	O
the	O
presentation	O
of	O
the	O
game	O
"	O
excellent	O
"	O
,	O
as	O
well	O
as	O
praising	O
the	O
aggression	O
of	O
the	B-Application
artificial	I-Application
intelligence	I-Application
.	O
</s>
<s>
Unlike	O
in	O
his	O
review	O
of	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
,	O
Colayco	O
felt	O
the	O
multiplayer	O
aspect	O
was	O
"	O
fun	O
"	O
.	O
</s>
<s>
His	O
main	O
critique	O
was	O
for	O
performance	B-General_Concept
,	O
stating	O
"	O
performance	B-General_Concept
can	O
chug	O
at	O
times	O
"	O
.	O
</s>
<s>
The	O
PC	O
version	O
multiplayer	O
was	O
criticized	O
as	O
being	O
a	O
step	O
back	O
from	O
that	O
of	O
Call	B-Application
of	I-Application
Duty	I-Application
:	I-Application
United	I-Application
Offensive	I-Application
.	O
</s>
<s>
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
was	O
the	O
most	O
popular	O
launch	O
title	O
on	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
,	O
with	O
200,000	O
units	O
sold	O
in	O
its	O
first	O
week	O
of	O
availability	O
.	O
</s>
<s>
77%	O
of	O
people	O
who	O
purchased	O
an	O
Xbox	B-Operating_System
360	I-Operating_System
also	O
purchased	O
the	O
game	O
,	O
which	O
contributed	O
to	O
its	O
high	O
sales	O
.	O
</s>
<s>
As	O
of	O
July	O
2006	O
,	O
1.4million	O
copies	O
of	O
the	O
game	O
had	O
been	O
sold	O
on	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
The	O
editors	O
of	O
Computer	O
Games	O
Magazine	O
named	O
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
the	O
seventh-best	O
computer	O
game	O
of	O
2005	O
.	O
</s>
<s>
A	O
television	O
advertisement	O
for	O
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
was	O
the	O
subject	O
of	O
some	O
controversy	O
in	O
2006	O
.	O
</s>
<s>
A	O
collector	O
's	O
edition	O
of	O
the	O
game	O
was	O
released	O
for	O
Windows	O
on	O
October	O
25	O
,	O
2005	O
and	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
labeled	O
as	O
the	O
"	O
Special	O
Edition	O
"	O
.	O
</s>
<s>
On	O
May	O
17	O
,	O
2006	O
,	O
Activision	O
announced	O
a	O
Game	O
of	O
the	O
Year	O
Edition	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
,	O
which	O
includes	O
material	O
from	O
the	O
Special	O
Edition	O
,	O
plus	O
a	O
token	O
to	O
download	O
the	O
Skirmish	O
Map	O
Pack	O
.	O
</s>
<s>
In	O
January	O
2006	O
,	O
MFORMA	O
(	O
now	O
Hands-On	O
Mobile	B-Application
)	O
released	O
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
for	O
mobile	B-Application
phones	O
.	O
</s>
<s>
The	O
mobile	B-Application
version	O
is	O
a	O
2D	O
top-down	O
shooter	O
.	O
</s>
