<s>
Zombie	B-Application
Apocalypse	I-Application
is	O
a	O
downloadable	O
action	B-Application
shoot	O
'	O
em	O
up	O
video	O
game	O
developed	O
by	O
Nihilistic	O
Software	O
and	O
published	O
by	O
Konami	O
.	O
</s>
<s>
In	O
2011	O
,	O
a	O
sequel	O
was	O
released	O
,	O
Zombie	B-Application
Apocalypse	I-Application
:	I-Application
Never	I-Application
Die	I-Application
Alone	I-Application
.	O
</s>
<s>
Zombie	B-Application
Apocalypse	I-Application
is	O
a	O
multidirectional	O
shoot	O
'	O
em	O
up	O
.	O
</s>
<s>
The	O
player	O
must	O
rescue	O
survivors	O
,	O
and	O
kill	O
waves	O
of	O
zombies	B-Application
using	O
a	O
range	O
of	O
weapons	O
and	O
the	O
environment	O
.	O
</s>
<s>
Nihilistic	O
sought	O
to	O
make	O
a	O
pure	O
arcade	O
shooter	O
,	O
akin	O
to	O
Robotron	B-Application
2084	I-Application
and	O
Smash	B-Application
TV	I-Application
.	O
</s>
<s>
Inspiration	O
for	O
the	O
environments	O
and	O
characters	O
was	O
taken	O
from	O
zombie	B-Application
films	O
,	O
including	O
Night	O
of	O
the	O
Living	O
Dead	O
and	O
Return	O
of	O
the	O
Living	O
Dead	O
.	O
</s>
<s>
The	O
game	O
received	O
"	O
mixed	O
or	O
average	O
reviews	O
"	O
on	O
both	O
platforms	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
GameSpot	O
called	O
it	O
"	O
Robotron	B-Application
:	I-Application
2084	I-Application
with	O
zombies	B-Application
...	O
what	O
it	O
lacks	O
in	O
innovation	O
it	O
more	O
than	O
makes	O
up	O
for	O
with	O
good	O
,	O
mindless	O
fun.	O
"	O
</s>
<s>
Destructoid	O
praised	O
the	O
variety	O
of	O
zombies	B-Application
in	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
version	O
review	O
,	O
but	O
added	O
"	O
by	O
the	O
time	O
you	O
hit	O
your	O
25th	O
night	O
,	O
you	O
've	O
pretty	O
much	O
seen	O
them	O
all.	O
"	O
</s>
<s>
However	O
,	O
1Up.com	O
criticized	O
the	O
repetition	O
,	O
as	O
well	O
as	O
the	O
difficulty	O
level	O
and	O
enemy	O
variety	O
,	O
saying	O
,	O
"	O
Worse	O
than	O
simply	O
being	O
tedious	O
,	O
though	O
,	O
is	O
how	O
jaw-grindingly	O
frustrating	O
Zombie	B-Application
Apocalypse	I-Application
becomes	O
.	O
</s>
