<s>
Comet	B-Device
Crash	I-Device
is	O
a	O
tower	B-Application
defense	I-Application
video	O
game	O
by	O
American	O
studio	O
Pelfast	O
.	O
</s>
<s>
It	O
was	O
released	O
for	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
home	O
console	O
via	O
PlayStation	B-Device
Network	I-Device
.	O
</s>
<s>
Your	O
purpose	O
is	O
to	O
defend	O
yourself	O
from	O
the	O
computer	O
artificial	B-Application
intelligence	I-Application
's	O
attacks	O
while	O
building	O
up	O
your	O
own	O
arsenal	O
to	O
lead	O
an	O
attack	O
against	O
the	O
AI	B-Application
.	O
</s>
