<s>
Ravenskull	B-Application
is	O
a	O
British	O
graphic	O
adventure	O
video	O
game	O
.	O
</s>
<s>
It	O
was	O
originally	O
developed	O
by	O
Martin	O
Edmondson	O
and	O
Nicholas	O
Chamberlain	O
for	O
the	O
BBC	B-Device
Micro	I-Device
and	O
Acorn	B-Device
Electron	I-Device
and	O
released	O
by	O
Superior	B-Device
Software	I-Device
in	O
1986	O
.	O
</s>
<s>
The	O
player	O
is	O
tasked	O
with	O
entering	O
Baron	O
Strieg	O
's	O
Castle	O
Ravenskull	B-Application
in	O
order	O
to	O
defend	O
the	O
village	O
of	O
Austberg	O
and	O
retrieve	O
a	O
stolen	O
silver	O
crucifix	O
,	O
which	O
has	O
been	O
split	O
into	O
quarters	O
and	O
found	O
on	O
four	O
different	O
levels	O
of	O
the	O
castle	O
.	O
</s>
<s>
Superior	B-Device
Software	I-Device
had	O
held	O
a	O
competition	O
with	O
a	O
cash	O
prize	O
offered	O
,	O
and	O
stating	O
a	O
deadline	O
for	O
entering	O
it	O
.	O
</s>
<s>
Level	O
1	O
-	O
Castle	O
Ravenskull	B-Application
:	O
Keys	O
(	O
for	O
opening	O
doors	O
and	O
gates	O
)	O
.	O
</s>
<s>
Superior	O
released	O
a	O
faithful	O
32-bit	O
port	O
for	O
the	O
Acorn	B-Device
Archimedes	I-Device
on	O
their	O
Play	O
It	O
Again	O
Sam	O
4	O
compilation	O
in	O
1994	O
.	O
</s>
<s>
This	O
version	O
was	O
not	O
compatible	O
with	O
the	O
Risc	B-Device
PC	I-Device
so	O
a	O
new	O
version	O
was	O
released	O
by	O
ProAction	O
in	O
1997	O
on	O
their	O
issue	O
of	O
PIAS	O
4	O
.	O
</s>
<s>
A	O
fully	O
revamped	O
Microsoft	B-Application
Windows	I-Application
version	O
was	O
released	O
in	O
2003	O
by	O
Superior	B-Device
Interactive	I-Device
,	O
the	O
modern	O
publishing	O
label	O
of	O
Superior	B-Device
Software	I-Device
,	O
with	O
new	O
graphics	O
and	O
a	O
significantly	O
larger	O
second	O
set	O
of	O
levels	O
known	O
as	O
"	O
Castle	O
Danube	O
"	O
.	O
</s>
<s>
The	O
possibility	O
of	O
a	O
mobile	B-Application
port	O
from	O
Masabi	O
was	O
circulated	O
in	O
late	O
May	O
2002	O
,	O
but	O
it	O
never	O
appeared	O
.	O
</s>
