<s>
Invasion	B-Application
Force	I-Application
is	O
a	O
science	O
fiction	O
action	B-Application
video	I-Application
game	I-Application
produced	O
by	O
the	O
Tandy	O
Corporation	O
in	O
June	O
,	O
1979	O
.	O
</s>
<s>
Invasion	B-Application
Force	I-Application
was	O
a	O
text-based	B-Application
,	O
real-time	O
,	O
Star	B-Operating_System
Trek	I-Operating_System
style	O
game	O
.	O
</s>
<s>
Glenn	O
Mai	O
reviewed	O
Invasion	B-Application
Force	I-Application
in	O
The	O
Space	O
Gamer	O
No	O
.	O
</s>
<s>
Mai	O
commented	O
that	O
"	O
If	O
you	O
do	O
n't	O
have	O
a	O
Star	B-Operating_System
Trek	I-Operating_System
game	O
and	O
want	O
one	O
,	O
get	O
Invasion	O
Force.	O
"	O
</s>
