<s>
Cosmic	B-Application
Guerilla	I-Application
is	O
a	O
fixed	O
shooter	O
arcade	B-Application
video	I-Application
game	I-Application
developed	O
by	O
Universal	O
and	O
released	O
1979	O
.	O
</s>
<s>
A	O
ZX	B-Operating_System
Spectrum	I-Operating_System
port	O
was	O
published	O
by	O
Crystal	O
Computing	O
in	O
1983	O
.	O
</s>
<s>
Cosmic	B-Application
Guerilla	I-Application
is	O
a	O
two-dimensional	O
fixed	O
shooter	O
game	O
.	O
</s>
<s>
In	O
contrast	O
to	O
Space	B-Application
Invaders	I-Application
the	O
aliens	O
are	O
arranged	O
in	O
a	O
single	O
vertical	O
line	O
on	O
each	O
side	O
of	O
the	O
screen	O
,	O
with	O
their	O
movement	O
being	O
towards	O
the	O
centre	O
,	O
one	O
or	O
more	O
at	O
a	O
time	O
,	O
in	O
an	O
attempt	O
to	O
capture	O
and	O
remove	O
the	O
player	O
's	O
shields	O
.	O
</s>
<s>
Cosmic	B-Application
Guerilla	I-Application
was	O
invariably	O
compared	O
to	O
Space	B-Application
Invaders	I-Application
,	O
though	O
Sinclair	O
User	O
described	O
it	O
as	O
the	O
"	O
next	O
step	O
up	O
"	O
,	O
with	O
its	O
different	O
scenarios	O
and	O
object	O
arrangement	O
.	O
</s>
