<s>
Robo	B-Application
Defense	I-Application
is	O
a	O
2009	O
real-time	O
strategy	O
tower	B-Application
defense	I-Application
video	O
game	O
developed	O
by	O
Lupis	O
Labs	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
16	O
September	O
2009	O
for	O
Android	B-Application
.	O
</s>
<s>
Robo	B-Application
Defense	I-Application
is	O
a	O
real-time	O
strategy	O
tower	B-Application
defense	I-Application
game	I-Application
with	O
five	O
different	O
maps	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
for	O
Android	B-Application
on	O
16	O
September	O
2009	O
by	O
Lupis	O
Labs	O
.	O
</s>
<s>
The	O
game	O
was	O
named	O
as	O
the	O
best-selling	O
premium	O
Android	B-Application
game	O
in	O
October	O
2009	O
and	O
was	O
downloaded	O
7,600	O
times	O
over	O
the	O
course	O
of	O
the	O
month	O
.	O
</s>
<s>
From	O
January	O
to	O
March	O
2011	O
,	O
the	O
game	O
regained	O
the	O
title	O
of	O
the	O
best-selling	O
premium	O
Android	B-Application
game	O
and	O
was	O
downloaded	O
186	O
thousand	O
times	O
in	O
the	O
Android	B-Application
Market	O
.	O
</s>
<s>
The	O
game	O
received	O
mostly	O
positive	O
reviews	O
,	O
with	O
some	O
comparing	O
the	O
game	O
to	O
Fieldrunners	B-Device
.	O
</s>
<s>
He	O
also	O
described	O
the	O
game	O
as	O
a	O
clone	O
of	O
Fieldrunners	B-Device
that	O
almost	O
has	O
the	O
same	O
graphics	O
when	O
compared	O
to	O
Fieldrunners	B-Device
.	O
</s>
<s>
However	O
,	O
the	O
reviewer	O
praised	O
the	O
game	O
for	O
giving	O
opportunity	O
for	O
players	O
to	O
upgrade	O
and	O
modify	O
the	O
turret	O
tower	O
,	O
since	O
it	O
makes	O
the	O
game	O
significantly	O
differ	O
from	O
the	O
more	O
straightforward	O
gameplay	O
of	O
Fieldrunners	B-Device
.	O
</s>
