<s>
Dead	B-Application
Nation	I-Application
is	O
a	O
top-down	O
shoot	O
'	O
em	O
up	O
video	O
game	O
for	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
developed	O
by	O
video	O
game	O
developer	O
Housemarque	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
November	O
30	O
,	O
2010	O
in	O
North	O
America	O
,	O
and	O
December	O
1	O
in	O
the	O
PAL	O
region	O
,	O
on	O
PlayStation	B-Device
Network	I-Device
.	O
</s>
<s>
Dead	B-Application
Nation	I-Application
takes	O
place	O
in	O
a	O
world	O
afflicted	O
by	O
a	O
zombie	B-Application
apocalypse	I-Application
.	O
</s>
<s>
The	O
player	O
can	O
choose	O
between	O
a	O
male	O
or	O
female	O
character	O
and	O
battle	O
different	O
types	O
of	O
zombies	B-Application
.	O
</s>
<s>
Dead	B-Application
Nation	I-Application
was	O
part	O
of	O
Sony	O
's	O
"	O
Welcome	O
Back	O
"	O
package	O
,	O
created	O
to	O
resolve	O
the	O
initial	O
PlayStation	B-Error_Name
Network	I-Error_Name
outage	I-Error_Name
.	O
</s>
<s>
In	O
February	O
2014	O
a	O
PlayStation	B-Operating_System
4	I-Operating_System
version	O
of	O
the	O
game	O
titled	O
the	O
Apocalypse	O
Edition	O
was	O
announced	O
along	O
with	O
the	O
PlayStation	B-Device
Vita	I-Device
version	O
.	O
</s>
<s>
The	O
original	O
Road	O
of	O
Devastation	O
downloadable	O
content	O
was	O
included	O
for	O
the	B-Operating_System
PS3	I-Operating_System
and	O
Vita	O
versions	O
,	O
and	O
the	O
PS4	B-Operating_System
version	O
was	O
free	O
for	O
PlayStation	O
Plus	O
subscribers	O
in	O
March	O
2014	O
.	O
</s>
<s>
The	O
PS4	B-Operating_System
and	O
Vita	O
versions	O
were	O
released	O
in	O
Japan	O
for	O
release	O
on	O
May	O
29	O
,	O
2014	O
.	O
</s>
<s>
Players	O
are	O
awarded	O
score	O
multipliers	O
and	O
money	O
when	O
zombies	B-Application
are	O
killed	O
.	O
</s>
<s>
wait	O
for	O
an	O
elevator	O
while	O
fighting	O
zombies	B-Application
or	O
kill	O
all	O
zombies	B-Application
in	O
the	O
area	O
)	O
.	O
</s>
<s>
Zombies	B-Application
are	O
attracted	O
by	O
flares	O
,	O
car	O
alarms	O
,	O
grenades	O
,	O
mines	O
,	O
and	O
vending	O
machines	O
.	O
</s>
<s>
Zombies	B-Application
can	O
be	O
killed	O
by	O
environmental	O
hazards	O
which	O
the	O
player	O
can	O
use	O
to	O
their	O
advantage	O
.	O
</s>
<s>
Players	O
can	O
encounter	O
a	O
variety	O
of	O
zombies	B-Application
.	O
</s>
<s>
Players	O
can	O
use	O
a	O
melee	O
and	O
rush	O
attack	O
against	O
zombies	B-Application
,	O
as	O
well	O
as	O
a	O
variety	O
of	O
weaponry	O
.	O
</s>
<s>
Using	O
the	O
PlayStation	B-Device
Network	I-Device
,	O
players	O
are	O
grouped	O
with	O
other	O
players	O
from	O
their	O
country	O
.	O
</s>
<s>
When	O
a	O
country	O
is	O
rid	O
of	O
zombies	B-Application
,	O
a	O
new	O
infection	O
cycle	O
begins	O
.	O
</s>
<s>
Society	O
has	O
collapsed	O
and	O
most	O
of	O
the	O
world	O
's	O
population	O
have	O
become	O
zombies	B-Application
due	O
to	O
a	O
virus	O
outbreak	O
.	O
</s>
<s>
Realizing	O
that	O
they	O
have	O
nothing	O
to	O
lose	O
,	O
and	O
there	O
is	O
no	O
way	O
out	O
,	O
they	O
bite	O
a	O
cyanide	O
capsule	O
they	O
have	O
implanted	O
inside	O
their	O
molar	O
,	O
in	O
case	O
they	O
are	O
overwhelmed	O
by	O
zombies	B-Application
,	O
to	O
prevent	O
enduring	O
the	O
pain	O
of	O
being	O
eaten	O
alive	O
.	O
</s>
<s>
As	O
the	O
doctor	O
notes	O
that	O
they	O
are	O
dying	O
,	O
he	O
rushes	O
to	O
see	O
what	O
is	O
happening	O
,	O
but	O
the	O
zombie	B-Application
virus	O
has	O
mutated	O
and	O
they	O
have	O
been	O
infected	O
,	O
turning	O
into	O
zombies	B-Application
right	O
after	O
the	O
capsule	O
is	O
opened	O
.	O
</s>
<s>
Assuming	O
the	O
first	O
person	O
nature	O
of	O
the	O
narrative	O
,	O
it	O
is	O
implied	O
that	O
they	O
have	O
become	O
sentient	O
zombies	B-Application
.	O
</s>
<s>
The	O
PlayStation	B-Operating_System
3	I-Operating_System
version	O
of	O
Dead	B-Application
Nation	I-Application
received	O
"	O
generally	O
favorable	O
reviews	O
"	O
,	O
while	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
and	O
Vita	O
versions	O
received	O
"	O
average	O
"	O
reviews	O
,	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
The	O
game	O
engine	O
was	O
noted	O
for	O
supporting	O
large	O
numbers	O
of	O
zombies	B-Application
on	O
screen	O
as	O
well	O
as	O
impressive	O
lighting	O
effects	O
.	O
</s>
<s>
In	O
2013	O
,	O
the	B-Operating_System
PS3	I-Operating_System
version	O
was	O
included	O
in	O
IGN	O
's	O
Top	O
25	O
PlayStation	B-Device
Network	I-Device
Games	O
,	O
at	O
position	O
12	O
.	O
</s>
<s>
Dead	B-Application
Nation	I-Application
lacked	O
online	O
voice	O
chat	O
upon	O
release	O
,	O
but	O
an	O
update	O
released	O
on	O
March	O
10	O
,	O
2011	O
added	O
this	O
feature	O
.	O
</s>
<s>
A	O
DLC	O
expansion	O
called	O
Road	O
of	O
Devastation	O
was	O
released	O
in	O
September	O
2011	O
for	O
the	B-Operating_System
PS3	I-Operating_System
,	O
and	O
in	O
April	O
2014	O
for	O
the	O
PlayStation	B-Device
Vita	I-Device
.	O
</s>
<s>
Zombie	B-Application
strength	O
,	O
health	O
and	O
speed	O
increase	O
with	O
each	O
round	O
.	O
</s>
<s>
The	B-Operating_System
PS3	I-Operating_System
version	O
of	O
the	O
Road	O
of	O
Devastation	O
DLC	O
received	O
"	O
generally	O
favorable	O
reviews	O
"	O
according	O
to	O
Metacritic	O
.	O
</s>
