<s>
OMG-Z	B-Device
is	O
a	O
zombie-themed	O
action	B-Application
puzzle	O
video	O
game	O
developed	O
by	O
UK-based	O
studio	O
Laughing	O
Jackal	O
.	O
</s>
<s>
It	O
was	O
released	O
as	O
a	O
PlayStation	B-Device
mini	I-Device
on	O
the	O
PlayStation	B-Device
Network	I-Device
in	O
North	O
America	O
on	O
2	O
August	O
2011	O
and	O
Europe	O
on	O
3	O
August	O
2011	O
.	O
</s>
<s>
Set	O
in	O
the	O
fictional	O
city	O
of	O
Redfield	O
during	O
a	O
zombie	B-Application
apocalypse	I-Application
,	O
the	O
gameplay	O
of	O
OMG-Z	B-Device
focuses	O
on	O
causing	O
chain	O
reactions	O
to	O
eliminate	O
the	O
zombies	O
.	O
</s>
<s>
Reviews	O
of	O
OMG-Z	B-Device
have	O
been	O
generally	O
favourable	O
with	O
a	O
Metacritic	O
score	O
of	O
89	O
out	O
of	O
100	O
,	O
making	O
it	O
,	O
as	O
of	O
12	O
September	O
2011	O
,	O
the	O
fourth	O
highest	O
scoring	O
PSP	B-Operating_System
game	O
on	O
the	O
site	O
.	O
</s>
<s>
Kristan	O
Reed	O
of	O
Eurogamer	O
viewed	O
OMG-Z	B-Device
as	O
"	O
a	O
monstrously	O
addictive	O
quick-fire	O
affair	O
that	O
utterly	O
nails	O
what	O
on-the-go	O
handheld	O
gaming	O
should	O
be	O
about.	O
"	O
</s>
<s>
However	O
,	O
it	O
has	O
been	O
noted	O
by	O
reviewers	O
that	O
releasing	O
the	O
game	O
on	O
the	O
PlayStation	B-Device
mini	I-Device
format	O
has	O
limited	O
the	O
scope	O
of	O
the	O
title	O
and	O
prevented	O
the	O
inclusion	O
of	O
features	O
such	O
as	O
online	O
leaderboards	O
.	O
</s>
