<s>
Gargoyle	B-Application
Games	I-Application
was	O
a	O
British	O
software	O
company	O
founded	O
in	O
1983	O
by	O
Roy	B-Application
Carter	I-Application
and	O
Greg	B-Application
Follis	I-Application
in	O
order	O
to	O
publish	O
their	O
first	O
game	O
,	O
Ad	O
Astra	O
.	O
</s>
<s>
They	O
generally	O
specialized	O
in	O
games	O
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
even	O
though	O
the	O
company	O
was	O
originally	O
named	O
with	O
the	O
intention	O
of	O
publishing	O
games	O
for	O
Dragon	B-Device
computers	I-Device
.	O
</s>
<s>
Two	O
of	O
Gargoyle	O
's	O
releases	O
,	O
Marsport	B-Application
and	O
Heavy	B-Application
on	I-Application
the	I-Application
Magick	I-Application
were	O
intended	O
to	O
be	O
the	O
first	O
in	O
a	O
series	O
of	O
games	O
but	O
the	O
planned	O
sequels	O
were	O
never	O
released	O
.	O
</s>
<s>
Marsport	B-Application
is	O
often	O
considered	O
an	O
unofficial	O
companion	O
to	O
Tir	B-Application
Na	I-Application
Nog	I-Application
and	O
Dun	B-Application
Darach	I-Application
due	O
to	O
its	O
similar	O
gameplay	O
.	O
</s>
<s>
Tir	O
Na	O
Nóg	O
and	O
Dun	B-Application
Darach	I-Application
are	O
part	O
of	O
the	O
same	O
series	O
,	O
with	O
Dun	B-Application
Darach	I-Application
being	O
a	O
prequel	O
released	O
the	O
following	O
year	O
.	O
</s>
