<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
is	O
a	O
first-person	O
shooter	O
developed	O
by	O
Rare	O
and	O
published	O
by	O
Microsoft	O
Game	O
Studios	O
.	O
</s>
<s>
It	O
was	O
released	O
as	O
a	O
launch	O
title	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
video	B-Application
game	I-Application
console	I-Application
in	O
2005	O
.	O
</s>
<s>
The	O
game	O
is	O
part	O
of	O
the	O
Perfect	B-Application
Dark	I-Application
series	O
and	O
a	O
prequel	O
to	O
the	O
original	O
Perfect	B-Application
Dark	I-Application
.	O
</s>
<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
features	O
a	O
campaign	O
mode	O
consisting	O
of	O
14	O
missions	O
that	O
can	O
be	O
played	O
solo	O
or	O
co-operatively	O
,	O
and	O
a	O
multiplayer	O
mode	O
where	O
a	O
maximum	O
of	O
32	O
players	O
can	O
compete	O
against	O
each	O
other	O
in	O
numerous	O
types	O
of	O
deathmatch	O
and	O
objective-based	O
games	O
.	O
</s>
<s>
Both	O
the	O
co-operative	O
and	O
multiplayer	O
modes	O
support	O
split	O
screen	O
,	O
system	B-Device
link	I-Device
,	O
and	O
the	O
Xbox	B-Application
Live	I-Application
online	O
service	O
.	O
</s>
<s>
The	O
game	O
was	O
under	O
development	O
for	O
five	O
years	O
and	O
was	O
originally	O
intended	O
to	O
be	O
released	O
for	O
the	O
GameCube	B-Application
and	O
later	O
the	O
Xbox	B-Device
.	O
</s>
<s>
During	O
development	O
,	O
several	O
intended	O
features	O
were	O
canceled	O
so	O
that	O
the	O
game	O
could	O
meet	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
launch	O
.	O
</s>
<s>
Upon	O
release	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
sold	O
more	O
than	O
one	O
million	O
copies	O
worldwide	O
and	O
received	O
generally	O
positive	O
reviews	O
from	O
critics	O
,	O
who	O
praised	O
its	O
graphics	O
and	O
numerous	O
multiplayer	O
modes	O
.	O
</s>
<s>
After	O
its	O
release	O
,	O
the	O
game	O
was	O
supported	O
with	O
downloadable	B-Protocol
content	I-Protocol
,	O
expanding	O
its	O
multiplayer	O
mode	O
with	O
new	O
maps	O
and	O
new	O
types	O
of	O
computer-controlled	O
bots	B-Protocol
.	O
</s>
<s>
In	O
2015	O
,	O
the	O
game	O
was	O
included	O
in	O
the	O
Rare	B-Application
Replay	I-Application
video	O
game	O
compilation	O
for	O
Xbox	B-Device
One	I-Device
.	O
</s>
<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
is	O
a	O
first-person	O
shooter	O
where	O
players	O
control	O
the	O
player	O
character	O
mostly	O
from	O
a	O
first-person	O
perspective	O
.	O
</s>
<s>
Besides	O
the	O
primary	O
function	O
,	O
all	O
of	O
the	O
weapons	O
in	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
have	O
one	O
or	O
two	O
additional	O
function	O
modes	O
that	O
generally	O
grant	O
the	O
player	O
with	O
special	O
abilities	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
Shockwave	O
Rifle	O
features	O
an	O
X-ray	B-Library
function	O
which	O
allows	O
the	O
player	O
to	O
see	O
enemies	O
through	O
walls	O
,	O
while	O
the	O
Plasma	O
Rifle	O
has	O
a	O
cloak	O
function	O
that	O
renders	O
the	O
player	O
character	O
invisible	O
to	O
enemies	O
at	O
the	O
cost	O
of	O
its	O
battery	O
charge	O
.	O
</s>
<s>
Unlike	O
the	O
original	O
Perfect	B-Application
Dark	I-Application
,	O
every	O
mission	O
contains	O
a	O
single	O
checkpoint	O
at	O
which	O
the	O
player	O
may	O
restart	O
if	O
Joanna	O
is	O
killed	O
or	O
loses	O
beyond	O
that	O
checkpoint	O
.	O
</s>
<s>
The	O
game	O
also	O
provides	O
a	O
co-operative	O
mode	O
where	O
two	O
players	O
may	O
play	O
through	O
the	O
game	O
's	O
campaign	O
together	O
via	O
split	O
screen	O
,	O
system	B-Device
link	I-Device
,	O
or	O
through	O
the	O
Xbox	B-Application
Live	I-Application
online	O
service	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
campaign	O
mode	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
features	O
a	O
multiplayer	O
mode	O
where	O
a	O
maximum	O
of	O
32	O
players	O
may	O
compete	O
in	O
numerous	O
types	O
of	O
deathmatch	O
and	O
objective-based	O
games	O
via	O
split	O
screen	O
,	O
system	B-Device
link	I-Device
,	O
or	O
Xbox	B-Application
Live	I-Application
.	O
</s>
<s>
Scenarios	O
range	O
from	O
Killcount	O
or	O
Team	O
Killcount	O
,	O
where	O
the	O
goal	O
is	O
to	O
kill	O
as	O
many	O
opposing	O
players	O
as	O
possible	O
,	O
to	O
objective-based	O
games	O
such	O
as	O
Capture	B-Application
the	I-Application
Flag	I-Application
and	O
Territorial	O
Gains	O
.	O
</s>
<s>
Players	O
can	O
either	O
choose	O
to	O
play	O
a	O
ranked	O
Deathmatch	O
or	O
DarkOps	O
,	O
where	O
they	O
will	O
be	O
matched	O
with	O
other	O
players	O
using	O
a	O
system	O
called	O
TrueSkill	B-Device
Matchmaking	I-Device
,	O
or	O
they	O
may	O
choose	O
a	O
player	O
match	O
where	O
they	O
can	O
choose	O
their	O
game	O
from	O
a	O
list	O
of	O
player-hosted	O
games	O
.	O
</s>
<s>
Like	O
the	O
original	O
Perfect	B-Application
Dark	I-Application
,	O
these	O
games	O
can	O
be	O
highly	O
customized	O
and	O
can	O
also	O
include	O
computer	O
game	O
bots	B-Protocol
.	O
</s>
<s>
For	O
example	O
,	O
the	O
Judge	O
bot	B-Protocol
always	O
attacks	O
leading	O
players	O
with	O
the	O
highest	O
kills	O
score	O
.	O
</s>
<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
is	O
set	O
in	O
an	O
alternate	O
2020	O
,	O
where	O
a	O
large	O
percentage	O
of	O
the	O
world	O
is	O
controlled	O
by	O
corporations	O
.	O
</s>
<s>
The	O
pair	O
fight	O
their	O
way	O
out	O
of	O
the	O
complex	O
,	O
but	O
their	O
extraction	O
is	O
interrupted	O
by	O
Zhang	O
Li	O
's	O
daughter	O
,	O
Mai	B-Device
Hem	I-Device
,	O
who	O
kills	O
Jack	O
before	O
Joanna	O
escapes	O
in	O
a	O
hovercraft	O
.	O
</s>
<s>
When	O
Joanna	O
agrees	O
to	O
join	O
the	O
Carrington	O
Institute	O
to	O
stop	O
dataDyne	O
,	O
Carrington	O
explains	O
that	O
Zeigler	O
had	O
been	O
working	O
on	O
an	O
algorithm	O
capable	O
of	O
decoding	O
extraterrestrial	O
glyphs	B-Application
at	O
a	O
dig	O
site	O
in	O
South	O
America	O
.	O
</s>
<s>
Traveling	O
to	O
Peru	O
,	O
Joanna	O
learns	O
that	O
the	O
glyphs	B-Application
are	O
leading	O
dataDyne	O
to	O
search	O
for	O
an	O
ancient	O
artefact	O
which	O
acts	O
as	O
a	O
power	O
source	O
for	O
the	O
Graal	O
,	O
a	O
device	O
which	O
endows	O
individuals	O
with	O
superhuman	O
powers	O
.	O
</s>
<s>
As	O
the	O
Carrington	O
Institute	O
starts	O
an	O
offensive	O
on	O
dataDyne	O
,	O
Joanna	O
rescues	O
several	O
Carrington	O
Institute	O
agents	O
before	O
avenging	O
her	O
father	O
's	O
death	O
by	O
killing	O
Mai	B-Device
Hem	I-Device
.	O
</s>
<s>
Development	O
of	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
began	O
on	O
the	O
GameCube	B-Application
with	O
a	O
very	O
small	O
team	O
of	O
roughly	O
ten	O
people	O
.	O
</s>
<s>
According	O
to	O
lead	O
designer	O
Chris	O
Tilston	O
,	O
"	O
it	O
was	O
basically	O
prototyping	B-Application
,	O
finding	O
out	O
where	O
we	O
could	O
go	O
and	O
how	O
we	O
could	O
get	O
there	O
"	O
.	O
</s>
<s>
When	O
Rare	O
was	O
purchased	O
by	O
Microsoft	O
in	O
2002	O
,	O
the	O
project	O
was	O
transferred	O
to	O
the	O
Xbox	B-Application
console	I-Application
and	O
the	O
game	O
's	O
multiplayer	O
mode	O
was	O
redesigned	O
for	O
Xbox	B-Application
Live	I-Application
online	O
play	O
.	O
</s>
<s>
Since	O
the	O
initial	O
version	O
of	O
the	O
game	O
pushed	O
the	B-Application
original	I-Application
Xbox	I-Application
hardware	O
"	O
pretty	O
hard	O
"	O
,	O
the	O
project	O
was	O
ultimately	O
transferred	O
to	O
the	O
Xbox	B-Device
successor	O
,	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
Tilston	O
revealed	O
that	O
the	B-Application
original	I-Application
Xbox	I-Application
version	O
was	O
"	O
about	O
12	O
months	O
away	O
"	O
from	O
completion	O
when	O
the	O
shift	O
occurred	O
.	O
</s>
<s>
The	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
gave	O
the	O
developers	O
more	O
possibilities	O
to	O
include	O
what	O
they	O
always	O
wanted	O
and	O
allowed	O
them	O
to	O
create	O
the	O
game	O
's	O
co-operative	O
mode	O
,	O
which	O
was	O
one	O
of	O
the	O
first	O
that	O
could	O
be	O
played	O
via	O
Xbox	B-Application
Live	I-Application
.	O
</s>
<s>
Designing	O
the	O
co-operative	O
mode	O
over	O
Xbox	B-Application
Live	I-Application
was	O
very	O
challenging	O
for	O
the	O
developers	O
.	O
</s>
<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
is	O
also	O
one	O
of	O
the	O
first	O
games	O
that	O
uses	O
Havok	B-General_Concept
's	O
HydraCore	O
physics	O
engine	O
,	O
which	O
was	O
specifically	O
designed	O
for	O
multi-core	O
video	O
game	O
systems	O
like	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
The	O
game	O
's	O
renderer	O
engine	O
employs	O
more	O
advanced	O
graphic	O
technologies	O
than	O
was	O
possible	O
in	O
the	O
previous	B-Application
console	I-Application
generation	I-Application
,	O
including	O
parallax	O
mapping	O
,	O
ambient	O
occlusion	O
,	O
subsurface	B-Algorithm
scattering	I-Algorithm
,	O
and	O
high	B-Device
dynamic	I-Device
range	I-Device
.	O
</s>
<s>
For	O
this	O
reason	O
,	O
the	O
team	O
implemented	O
moves	O
such	O
as	O
climbing	O
obstacles	O
or	O
,	O
more	O
specifically	O
,	O
the	O
combat	O
roll	O
,	O
which	O
makes	O
players	O
harder	O
to	O
hit	O
since	O
it	O
breaks	O
the	O
game	O
's	O
auto-aim	B-Protocol
lock	I-Protocol
.	O
</s>
<s>
Because	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
was	O
intended	O
to	O
be	O
an	O
Xbox	B-Operating_System
360	I-Operating_System
launch	O
title	O
,	O
the	O
last	O
stage	O
of	O
development	O
was	O
very	O
challenging	O
and	O
several	O
features	O
had	O
to	O
be	O
canceled	O
so	O
that	O
the	O
game	O
could	O
meet	O
the	O
launch	O
deadline	O
.	O
</s>
<s>
The	O
number	O
of	O
players	O
in	O
multiplayer	O
matches	O
had	O
to	O
be	O
reduced	O
from	O
50	O
to	O
32	O
,	O
and	O
a	O
"	O
dataDyne	O
TV	O
"	O
mode	O
that	O
would	O
have	O
allowed	O
players	O
to	O
upload	O
and	O
watch	O
multiplayer	O
matches	O
over	O
Xbox	B-Application
Live	I-Application
was	O
eventually	O
rejected	O
.	O
</s>
<s>
Final	O
development	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
was	O
very	O
rushed	O
.	O
</s>
<s>
Rare	O
later	O
stated	O
they	O
felt	O
very	O
confident	O
they	O
would	O
pass	O
,	O
but	O
it	O
was	O
a	O
significant	O
risk	O
producing	O
700,000	O
disks	O
if	O
a	O
bug	B-Error_Name
turned	O
up	O
.	O
</s>
<s>
The	O
actual	O
development	O
of	O
the	O
game	O
took	O
five	O
years	O
overall	O
to	O
complete	O
and	O
spanned	O
three	O
platforms	O
:	O
the	O
GameCube	B-Application
,	O
the	O
Microsoft	O
Xbox	B-Device
and	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
Tilston	O
remarked	O
that	O
,	O
throughout	O
the	O
course	O
of	O
development	O
,	O
the	O
team	O
noticed	O
how	O
the	O
video	O
game	O
industry	O
had	O
evolved	O
as	O
computing	O
and	O
graphics	O
power	O
increased	O
,	O
and	O
how	O
earlier	O
games	O
like	O
GoldenEye	B-Application
007	I-Application
and	O
Donkey	B-Application
Kong	I-Application
Country	I-Application
where	O
their	O
development	O
costs	O
were	O
minimal	O
could	O
easily	O
be	O
profitable	O
with	O
a	O
few	O
programmers	O
.	O
</s>
<s>
Tilston	O
also	O
revealed	O
that	O
the	O
team	O
behind	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
was	O
composed	O
of	O
roughly	O
25	O
people	O
for	O
most	O
of	O
the	O
project	O
,	O
which	O
was	O
"	O
ridiculously	O
"	O
small	O
compared	O
to	O
Xbox	B-Application
360	I-Application
generation	I-Application
standards	O
where	O
there	O
are	O
100	O
or	O
200	O
people	O
working	O
on	O
a	O
team	O
.	O
</s>
<s>
Despite	O
this	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
,	O
from	O
a	O
development	O
cost	O
,	O
made	O
four	O
times	O
its	O
money	O
back	O
.	O
</s>
<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
was	O
first	O
hinted	O
at	O
Nintendo	O
Space	O
World	O
in	O
August	O
2000	O
,	O
where	O
a	O
brief	O
demo	O
showed	O
a	O
3D	O
real-time	O
render	O
of	O
Joanna	O
Dark	O
.	O
</s>
<s>
Some	O
reports	O
further	O
suggested	O
the	O
development	O
of	O
the	O
game	O
with	O
Rare	O
applying	O
to	O
trademark	O
the	O
names	O
"	O
After	O
Dark	O
"	O
,	O
"	O
Perfect	B-Application
Dark	I-Application
Evolution	O
"	O
and	O
the	O
phrase	O
"	O
Shot	O
in	O
the	O
Dark	O
"	O
.	O
</s>
<s>
At	O
E3	O
2001	O
,	O
Nintendo	O
advertised	O
the	O
title	O
"	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
"	O
on	O
a	O
list	O
of	O
upcoming	O
GameCube	B-Application
releases	O
,	O
but	O
the	O
list	O
was	O
quickly	O
removed	O
.	O
</s>
<s>
In	O
January	O
2002	O
,	O
it	O
was	O
reported	O
that	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
was	O
delayed	O
until	O
at	O
least	O
2004	O
due	O
to	O
internal	O
team	O
problems	O
at	O
Rare	O
.	O
</s>
<s>
In	O
May	O
2005	O
,	O
one	O
of	O
the	O
rewards	O
in	O
the	O
OurColony	B-Device
viral	O
marketing	O
campaign	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
console	O
was	O
a	O
new	O
image	O
of	O
Joanna	O
Dark	O
.	O
</s>
<s>
At	O
the	O
official	O
unveiling	O
of	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
,	O
it	O
was	O
announced	O
that	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
would	O
be	O
a	O
launch	O
title	O
for	O
the	O
new	O
system	O
in	O
the	O
fall	O
of	O
2005	O
.	O
</s>
<s>
Prior	O
to	O
its	O
release	O
,	O
Microsoft	O
arranged	O
a	O
deal	O
with	O
Tor	O
Books	O
to	O
produce	O
novels	O
set	O
in	O
the	O
Perfect	B-Application
Dark	I-Application
universe	O
.	O
</s>
<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
was	O
first	O
released	O
in	O
North	O
America	O
on	O
November	O
22	O
,	O
2005	O
.	O
</s>
<s>
The	O
game	O
was	O
playable	O
at	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
Zero	O
Hour	O
Launch	O
event	O
,	O
alongside	O
Rare	O
's	O
Kameo	B-Application
:	I-Application
Elements	I-Application
of	I-Application
Power	I-Application
and	O
Activision	O
's	O
Call	B-Application
of	I-Application
Duty	I-Application
2	I-Application
.	O
</s>
<s>
In	O
Europe	O
,	O
Microsoft	O
organized	O
a	O
party	O
by	O
simulating	O
an	O
apartment	O
as	O
Joanna	O
's	O
home	O
,	O
where	O
several	O
journalists	O
could	O
play	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
During	O
the	O
Japanese	O
launch	O
weekend	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
became	O
the	O
second	O
best-selling	O
Xbox	B-Operating_System
360	I-Operating_System
game	O
with	O
roughly	O
15,000	O
units	O
sold	O
,	O
behind	O
Namco	O
's	O
Ridge	B-Application
Racer	I-Application
6	I-Application
.	O
</s>
<s>
As	O
of	O
October	O
2006	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
had	O
sold	O
more	O
than	O
one	O
million	O
copies	O
worldwide	O
,	O
eventually	O
joining	O
Microsoft	O
's	O
"	O
Platinum	B-Device
Hits	I-Device
"	O
game	O
selection	O
.	O
</s>
<s>
In	O
2015	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
was	O
released	O
as	O
a	O
backward-compatible	B-Device
game	O
for	O
the	B-Device
Xbox	I-Device
One	I-Device
and	O
included	O
in	O
the	O
Rare	B-Application
Replay	I-Application
compilation	O
.	O
</s>
<s>
In	O
2019	O
,	O
the	O
game	O
was	O
enhanced	B-Device
for	O
the	B-Device
Xbox	I-Device
One	I-Device
with	O
higher	O
resolutions	O
,	O
faster	O
frame	O
rates	O
,	O
and	O
improved	O
textures	O
.	O
</s>
<s>
When	O
the	O
game	O
was	O
released	O
,	O
new	O
multiplayer	O
scenarios	O
and	O
a	O
Counter-Operative	O
mode	O
similar	O
to	O
that	O
of	O
the	O
original	O
Perfect	B-Application
Dark	I-Application
were	O
originally	O
intended	O
to	O
be	O
released	O
as	O
downloadable	B-Protocol
content	I-Protocol
.	O
</s>
<s>
According	O
to	O
him	O
,	O
"	O
It	O
would	O
have	O
required	O
much	O
groundwork	O
to	O
be	O
laid	O
in	O
the	O
core	O
AI	B-Application
code	O
,	O
which	O
meant	O
that	O
it	O
was	O
unlikely	O
to	O
be	O
available	O
as	O
downloadable	B-Protocol
content	I-Protocol
post-release	O
"	O
.	O
</s>
<s>
In	O
May	O
2006	O
,	O
an	O
auto-update	O
was	O
made	O
available	O
on	O
Xbox	B-Application
Live	I-Application
,	O
responsible	O
for	O
fixing	O
some	O
bugs	B-Error_Name
and	O
adding	O
new	O
multiplayer	O
options	O
to	O
the	O
game	O
.	O
</s>
<s>
The	O
bug	B-Error_Name
fixes	O
included	O
code	O
to	O
prevent	O
an	O
ongoing	O
problem	O
where	O
players	O
could	O
walk	O
through	O
the	O
air	O
,	O
an	O
issue	O
where	O
some	O
weapons	O
could	O
make	O
use	O
of	O
rapid	O
fire	O
,	O
and	O
a	O
map-exiting	O
glitch	O
,	O
among	O
others	O
.	O
</s>
<s>
The	O
new	O
multiplayer	O
options	O
provided	O
seven	O
new	O
bot	B-Protocol
types	O
and	O
the	O
ability	O
to	O
use	O
bots	B-Protocol
in	O
DarkOps	O
matches	O
,	O
since	O
bots	B-Protocol
had	O
only	O
one	O
AI	B-Application
variant	O
and	O
were	O
only	O
available	O
in	O
DeathMatch	O
scenarios	O
when	O
the	O
game	O
was	O
released	O
.	O
</s>
<s>
A	O
playable	O
demo	O
of	O
the	O
game	O
was	O
made	O
freely	O
available	O
on	O
the	O
Xbox	B-Application
Live	I-Application
Marketplace	O
shortly	O
afterwards	O
.	O
</s>
<s>
A	O
multiplayer	O
map	O
pack	O
,	O
called	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
Map	O
Pack	O
One	O
,	O
was	O
released	O
on	O
June	O
7	O
,	O
2006	O
,	O
containing	O
the	O
demo	O
's	O
new	O
multiplayer	O
map	O
as	O
well	O
as	O
three	O
other	O
new	O
maps	O
to	O
add	O
to	O
the	O
game	O
's	O
original	O
six	O
.	O
</s>
<s>
On	O
October	O
31	O
,	O
2006	O
,	O
Rare	O
revealed	O
a	O
special	O
platinum	O
edition	O
of	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
,	O
featuring	O
the	O
first	O
map	O
pack	O
and	O
two	O
additional	O
maps	O
as	O
extras	O
.	O
</s>
<s>
The	O
two	O
new	O
maps	O
were	O
later	O
released	O
for	O
free	O
in	O
a	O
pack	O
called	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
Map	O
Pack	O
Two	O
.	O
</s>
<s>
These	O
maps	O
are	O
updated	O
versions	O
of	O
the	O
Felicity	O
and	O
Ruins	O
maps	O
from	O
the	O
original	O
Perfect	B-Application
Dark	I-Application
.	O
</s>
<s>
Perfect	B-Device
Dark	I-Device
Zero	I-Device
received	O
generally	O
positive	O
reviews	O
from	O
critics	O
.	O
</s>
<s>
Writing	O
for	O
GameSpot	O
,	O
Greg	O
Kasavin	O
felt	O
that	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
"	O
champions	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
with	O
its	O
excellent	O
assortment	O
of	O
single	O
and	O
multiplayer	O
game	O
types	O
,	O
as	O
well	O
as	O
its	O
incredible	O
good	O
looks	O
and	O
dynamic	O
,	O
intense	O
action	O
"	O
.	O
</s>
<s>
Charles	O
Onyett	O
of	O
IGN	O
praised	O
the	O
game	O
's	O
replay	O
value	O
,	O
but	O
also	O
criticised	O
single-player	O
aspects	O
such	O
as	O
the	O
weak	O
artificial	B-Application
intelligence	I-Application
of	O
enemies	O
,	O
commenting	O
that	O
"	O
they	O
never	O
display	O
any	O
advanced	O
assault	O
tactics	O
"	O
.	O
</s>
<s>
Bryn	O
Williams	O
of	O
GameSpy	O
considered	O
the	O
graphics	O
as	O
a	O
"	O
stunning	O
look	O
at	O
what	O
the	O
360	B-Operating_System
hardware	O
is	O
capable	O
of	O
"	O
,	O
but	O
also	O
admitted	O
that	O
the	O
animation	O
"	O
is	O
a	O
little	O
too	O
slow	O
and	O
sometimes	O
creates	O
an	O
unwelcome	O
sense	O
of	O
cartoonishness	O
"	O
.	O
</s>
<s>
Multiplayer	O
matches	O
of	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
were	O
widely	O
well	O
received	O
.	O
</s>
<s>
Despite	O
solid	O
reviews	O
,	O
numerous	O
publications	O
remarked	O
that	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
did	O
not	O
meet	O
expectations	O
.	O
</s>
<s>
In	O
a	O
positive	O
review	O
,	O
GameSpy	O
praised	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
for	O
doing	O
many	O
things	O
well	O
,	O
but	O
acknowledge	O
that	O
it	O
was	O
not	O
a	O
killer-app	O
.	O
</s>
<s>
Edge	O
said	O
that	O
the	O
game	O
"	O
falls	O
short	O
"	O
,	O
especially	O
when	O
compared	O
to	O
Halo	O
:	O
Combat	O
Evolved	O
,	O
a	O
successful	O
first-person	O
shooter	O
that	O
was	O
released	O
as	O
a	O
launch	O
title	O
for	O
the	B-Application
original	I-Application
Xbox	I-Application
.	O
</s>
<s>
At	O
the	O
2005	O
Spike	O
Video	O
Game	O
Awards	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
was	O
nominated	O
for	O
Best	O
Original	O
Score	O
and	O
Best	O
First	O
Person	O
Action	O
,	O
while	O
Joanna	O
Dark	O
was	O
nominated	O
for	O
Cyber	O
Vixen	O
of	O
the	O
Year	O
.	O
</s>
<s>
At	O
IGNs	O
Best	O
of	O
2005	O
awards	O
,	O
Perfect	B-Device
Dark	I-Device
Zero	I-Device
won	O
Best	O
Offline	O
Multiplayer	O
Game	O
and	O
Best	O
Xbox	B-Application
Live	I-Application
Game	O
in	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
categories	O
,	O
and	O
was	O
nominated	O
for	O
Best	O
First-Person	O
Shooter	O
,	O
also	O
in	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
categories	O
.	O
</s>
<s>
Similarly	O
,	O
at	O
GameSpots	O
Best	O
of	O
2005	O
awards	O
,	O
the	O
game	O
was	O
nominated	O
for	O
Best	O
Original	O
Music	O
,	O
Best	O
Multiplayer	O
Game	O
,	O
Best	O
Shooter	O
,	O
and	O
Best	O
Xbox	B-Operating_System
360	I-Operating_System
Game	O
.	O
</s>
