<s>
geoDefense	B-Application
is	O
a	O
2008	O
tower	B-Application
defense	I-Application
game	I-Application
created	O
for	O
iOS	B-Application
devices	O
developed	O
by	O
American	O
studio	O
Critical	O
Thought	O
Games	O
.	O
</s>
<s>
A	O
sequel	O
,	O
geoDefense	B-Application
Swarm	I-Application
,	O
was	O
released	O
on	O
September	O
14	O
,	O
2009	O
,	O
and	O
was	O
listed	O
by	O
Time	O
magazine	O
as	O
one	O
of	O
the	O
best	O
games	O
of	O
the	O
year	O
.	O
</s>
<s>
An	O
Xbox	B-Application
Live	I-Application
enabled	O
version	O
was	O
released	O
for	O
Windows	B-Protocol
Phone	I-Protocol
on	O
June	O
8	O
,	O
2011	O
.	O
</s>
<s>
As	O
of	O
the	O
release	O
of	O
iPhone	O
iOS	B-Application
11	O
,	O
the	O
game	O
was	O
removed	O
from	O
the	O
App	O
Store	O
because	O
of	O
incompatibility	O
.	O
</s>
<s>
geoDefense	B-Application
follows	O
the	O
gameplay	O
structure	O
of	O
typical	O
tower	B-Application
defense	I-Application
games	I-Application
.	O
</s>
