<s>
Obsidian	B-Application
is	O
an	O
action-adventure	O
computer	O
game	O
for	O
the	O
Amstrad	B-Device
CPC	I-Device
personal	O
computer	O
published	O
by	O
Artic	O
Computing	O
in	O
1986	O
.	O
</s>
<s>
The	O
game	O
is	O
set	O
on	O
the	O
titular	O
space	O
station	O
located	O
within	O
the	O
centre	O
of	O
an	O
asteroid	O
,	O
which	O
is	O
out	O
of	O
control	O
and	O
drifting	O
towards	O
a	O
black	B-Application
hole	I-Application
.	O
</s>
<s>
The	O
player	O
must	O
guide	O
an	O
astronaut	O
with	O
a	O
jet	O
pack	O
around	O
the	O
station	O
and	O
re-activate	O
its	O
engine	O
shields	O
to	O
prevent	O
the	O
Obsidian	B-Application
's	O
destruction	O
.	O
</s>
<s>
This	O
involves	O
collecting	O
items	O
and	O
using	O
them	O
to	O
solve	O
puzzles	O
,	O
while	O
avoiding	O
the	O
Obsidian	B-Application
's	O
reactivated	O
security	O
systems	O
.	O
</s>
<s>
Obsidian	B-Application
is	O
the	O
first	O
game	O
that	O
was	O
developed	O
by	O
Revolution	O
Software	O
co-founder	O
Tony	O
Warriner	O
,	O
who	O
was	O
a	O
school	O
pupil	O
at	O
the	O
time	O
.	O
</s>
<s>
Due	O
to	O
concentrating	O
on	O
Obsidian	B-Application
's	O
development	O
rather	O
than	O
revising	O
he	O
failed	O
all	O
of	O
his	O
exams	O
.	O
</s>
<s>
Obsidian	B-Application
is	O
an	O
action-adventure	O
presented	O
in	O
two	O
dimensions	O
,	O
spread	O
across	O
approximately	O
50	O
game	O
screens	O
.	O
</s>
<s>
Players	O
control	O
a	O
jet	O
pack	O
wearing	O
astronaut	O
who	O
must	O
deactivate	O
the	O
five	O
engines	O
of	O
the	O
titular	O
spacestation	O
Obsidian	B-Application
,	O
which	O
is	O
located	O
in	O
the	O
hollow	O
centre	O
carved	O
out	O
of	O
an	O
asteroid	O
.	O
</s>
<s>
The	O
crew	O
of	O
the	O
Obsidian	B-Application
have	O
temporarily	O
abandoned	O
the	O
vessel	O
in	O
order	O
to	O
allow	O
it	O
to	O
pass	O
through	O
a	O
black	B-Application
hole	I-Application
.	O
</s>
<s>
The	O
Obsidian	B-Application
's	O
internal	O
systems	O
are	O
capable	O
of	O
withstanding	O
the	O
black	B-Application
hole	I-Application
,	O
but	O
the	O
station	O
cannot	O
shield	O
its	O
human	O
inhabitants	O
from	O
the	O
gravitational	O
forces	O
.	O
</s>
<s>
The	O
crew	O
have	O
taken	O
refuge	O
in	O
a	O
smaller	O
craft	O
which	O
has	O
been	O
shielded	O
,	O
intending	O
to	O
return	O
to	O
the	O
Obsidian	B-Application
when	O
both	O
vessels	O
have	O
passed	O
through	O
the	O
black	B-Application
hole	I-Application
.	O
</s>
<s>
A	O
radiation	O
storm	O
has	O
damaged	O
the	O
Obsidian	B-Application
's	O
engine	O
protection	O
systems	O
and	O
erased	O
its	O
flight	O
path	O
,	O
leaving	O
the	O
station	O
drifting	O
towards	O
the	O
black	B-Application
hole	I-Application
where	O
it	O
will	O
be	O
destroyed	O
.	O
</s>
<s>
Only	O
one	O
member	O
of	O
the	O
crew	O
has	O
the	O
skills	O
necessary	O
to	O
return	O
to	O
the	O
Obsidian	B-Application
and	O
prepare	O
it	O
to	O
pass	O
through	O
the	O
black	B-Application
hole	I-Application
,	O
this	O
is	O
the	O
game	O
's	O
player	O
character	O
.	O
</s>
<s>
The	O
astronaut	O
is	O
forced	O
to	O
contend	O
with	O
the	O
Obsidian	B-Application
's	O
re-activated	O
security	O
system	O
which	O
has	O
resulted	O
in	O
security	O
robots	O
being	O
deployed	O
,	O
the	O
space	O
station	O
's	O
internal	O
doors	O
sealing	O
and	O
defensive	O
laser	O
grids	O
becoming	O
active	O
.	O
</s>
<s>
Once	O
the	O
player	O
has	O
restored	O
power	O
,	O
reactivated	O
the	O
Obsidian	B-Application
's	O
engines	O
and	O
reset	O
the	O
station	O
's	O
flight	O
path	O
,	O
there	O
is	O
a	O
limited	O
time	O
to	O
teleport	B-General_Concept
back	O
to	O
the	O
smaller	O
shielded	O
craft	O
before	O
the	O
Obsidian	B-Application
's	O
engines	O
carry	O
the	O
astronaut	O
through	O
the	O
black	B-Application
hole	I-Application
without	O
being	O
shielded	O
.	O
</s>
<s>
Obsidian	B-Application
is	O
the	O
first	O
game	O
developed	O
by	O
Tony	O
Warriner	O
,	O
one	O
of	O
four	O
founders	O
of	O
the	O
adventure	O
game	O
developer	O
Revolution	O
Software	O
.	O
</s>
<s>
This	O
interest	O
resulted	O
in	O
him	O
creating	O
Obsidian	B-Application
when	O
he	O
should	O
have	O
been	O
studying	O
for	O
his	O
school	O
exams	O
,	O
resulting	O
in	O
him	O
failing	O
every	O
exam	O
.	O
</s>
<s>
The	O
same	O
reviewer	O
stated	O
that	O
Obsidian	B-Application
's	O
graphics	O
are	O
its	O
most	O
striking	O
feature	O
.	O
</s>
<s>
by	O
Massimo	O
Valducci	O
,	O
several	O
months	O
later	O
when	O
Obsidian	B-Application
was	O
re-released	O
on	O
the	O
budget	O
label	O
Americana	O
.	O
</s>
