<s>
X-COM	B-Application
(	O
also	O
X-COM	B-Application
:	I-Application
First	I-Application
Alien	I-Application
Invasion	I-Application
)	O
was	O
part	O
of	O
a	O
budget	O
range	O
video	O
game	O
series	O
released	O
in	O
1999	O
by	O
Hasbro	O
Interactive	O
for	O
Microsoft	B-Application
Windows	I-Application
that	O
relied	O
solely	O
on	O
the	O
play-by-mail	O
concept	O
.	O
</s>
<s>
X-COM	B-Application
has	O
50	O
maps	O
(	O
10	O
for	O
each	O
setting	O
-	O
Urban	O
,	O
UFO	O
,	O
Ice	O
,	O
X-COM	B-Application
Base	O
and	O
Alien	O
Base	O
)	O
.	O
</s>
