<s>
Marsport	B-Application
is	O
a	O
science	O
fiction	O
computer	O
game	O
that	O
was	O
released	O
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
Amstrad	B-Device
CPC	I-Device
home	O
computers	O
in	O
1985	O
.	O
</s>
<s>
It	O
was	O
published	O
by	O
Gargoyle	B-Application
Games	I-Application
in	O
the	O
United	O
Kingdom	O
and	O
Dro	O
Soft	O
in	O
Spain	O
.	O
</s>
<s>
Marsport	B-Application
was	O
intended	O
to	O
be	O
the	O
first	O
part	O
of	O
a	O
trilogy	O
called	O
"	O
The	O
Siege	O
of	O
Earth	O
"	O
but	O
parts	O
two	O
and	O
three	O
(	O
Fornax	O
and	O
Gath	O
)	O
were	O
not	O
forthcoming	O
.	O
</s>
<s>
Because	O
of	O
this	O
,	O
it	O
is	O
often	O
regarded	O
as	O
being	O
part	O
of	O
an	O
unofficial	O
trilogy	O
alongside	O
Tir	B-Application
Na	I-Application
Nog	I-Application
and	O
Dun	B-Application
Darach	I-Application
(	O
both	O
of	O
which	O
are	O
part	O
of	O
the	O
same	O
official	O
series	O
)	O
due	O
to	O
its	O
having	O
very	O
similar	O
gameplay	O
to	O
these	O
titles	O
.	O
</s>
<s>
Marsport	B-Application
also	O
has	O
similarities	O
to	O
the	O
later	O
Gargoyle	O
game	O
Heavy	B-Application
on	I-Application
the	I-Application
Magick	I-Application
.	O
</s>
<s>
Unfortunately	O
,	O
these	O
plans	O
are	O
concealed	O
somewhere	O
in	O
the	O
Martian	O
city	O
of	O
Marsport	B-Application
,	O
now	O
Sept-occupied	O
and	O
booby-trapped	O
by	O
the	O
city	O
's	O
M-Central	O
computer	O
.	O
</s>
<s>
Marsport	B-Application
was	O
developed	O
and	O
published	O
by	O
Gargoyle	B-Application
Games	I-Application
.	O
</s>
<s>
Marsport	B-Application
received	O
positive	O
reviews	O
on	O
release	O
.	O
</s>
