<s>
Call	B-Application
of	I-Application
Duty	I-Application
:	I-Application
United	I-Application
Offensive	I-Application
is	O
an	O
expansion	O
pack	O
for	O
the	O
first-person	O
shooter	O
video	O
game	O
Call	B-Application
of	I-Application
Duty	I-Application
.	O
</s>
<s>
It	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
on	O
September	O
14	O
,	O
2004	O
,	O
and	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
on	O
November	O
22	O
,	O
2004	O
.	O
</s>
<s>
The	O
biggest	O
changes	O
made	O
by	O
United	B-Application
Offensive	I-Application
are	O
in	O
the	O
multiplayer	O
aspect	O
of	O
the	O
game	O
.	O
</s>
<s>
There	O
are	O
new	O
maps	O
which	O
are	O
much	O
larger	O
than	O
the	O
ones	O
in	O
the	O
original	O
game	O
,	O
new	B-Application
weapons	I-Application
from	O
the	O
single	O
player	O
campaign	O
,	O
an	O
in-game	O
rank	O
system	O
which	O
grants	O
additional	O
bonuses	O
with	O
more	O
points	O
,	O
and	O
vehicles	O
such	O
as	O
tanks	O
and	O
jeeps	O
.	O
</s>
<s>
Scott	O
Riley	O
is	O
the	O
first	O
playable	O
protagonist	O
of	O
United	B-Application
Offensive	I-Application
in	O
the	O
American	O
campaign	O
.	O
</s>
<s>
James	O
Doyle	O
is	O
the	O
second	O
playable	O
protagonist	O
in	O
United	B-Application
Offensive	I-Application
,	O
serving	O
as	O
the	O
playable	O
character	O
in	O
the	O
British	O
campaign	O
.	O
</s>
<s>
Doyle	O
returns	O
in	O
Call	B-Application
of	I-Application
Duty	I-Application
3	I-Application
as	O
the	O
player	O
character	O
of	O
the	O
British/French	O
sections	O
of	O
the	O
campaign.Pvt	O
.	O
</s>
<s>
Yuri	O
Petrenko	O
is	O
the	O
playable	O
Soviet	O
protagonist	O
in	O
United	B-Application
Offensive	I-Application
.	O
</s>
<s>
The	O
ranks	O
are	O
reset	O
each	O
map	O
and	O
are	O
not	O
persistent.United	O
Offensive	O
adds	O
three	O
new	O
multiplayer	O
modes	O
to	O
the	O
game	O
:	O
Domination	O
,	O
Capture	B-Application
the	I-Application
Flag	I-Application
,	O
and	O
Base	O
Assault	O
.	O
</s>
<s>
The	O
most	O
traditional	O
game	O
mode	O
is	O
Capture	B-Application
the	I-Application
Flag	I-Application
.	O
</s>
<s>
ReceptionComputer	O
Games	O
Magazine	O
presented	O
United	B-Application
Offensive	I-Application
with	O
its	O
2004	O
"	O
Expansion	O
of	O
the	O
Year	O
"	O
award	O
.	O
</s>
<s>
The	O
editors	O
wrote	O
,	O
"	O
Anyone	O
that	O
enjoys	O
the	O
original	O
Call	B-Application
of	I-Application
Duty	I-Application
will	O
be	O
hard-pressed	O
to	O
find	O
fault	O
with	O
this	O
—	O
if	O
you	O
want	O
one	O
expansion	O
to	O
serve	O
as	O
a	O
role	O
model	O
for	O
all	O
others	O
,	O
this	O
is	O
the	O
one.	O
"	O
</s>
