<s>
Zack	B-Application
Zero	I-Application
is	O
a	O
2.5D	O
platform-adventure	O
video	O
game	O
developed	O
and	O
published	O
by	O
Crocodile	O
Entertainment	O
via	O
PlayStation	B-Device
Network	I-Device
on	O
January	O
17	O
,	O
2012	O
and	O
Microsoft	B-Application
Windows	I-Application
on	O
April	O
29	O
,	O
2013	O
.	O
</s>
<s>
The	O
player	O
is	O
involved	O
in	O
helping	O
Zack	B-Application
Zero	I-Application
save	O
his	O
partner	O
Marlene	O
from	O
Evil	O
Zulrog	O
,	O
who	O
wishes	O
to	O
exchange	O
her	O
for	O
a	O
unique	O
material	O
involved	O
in	O
time	O
travel	O
called	O
Kelestinia	O
.	O
</s>
