<s>
The	B-Operating_System
Dungeon	I-Operating_System
Revealed	I-Operating_System
is	O
a	O
dungeon	B-Application
crawl	O
PC	O
game	O
created	O
by	O
John	O
Raymonds	O
and	O
published	O
by	O
Woodrose	O
Editions	O
in	O
1987	O
.	O
</s>
<s>
The	O
game	O
is	O
an	O
enhanced	O
commercial	O
release	O
of	O
Raymonds	O
 '	O
previous	O
game	O
The	O
Dungeon	B-Application
of	O
Doom	O
,	O
released	O
as	O
shareware	B-License
in	O
1985	O
.	O
</s>
<s>
A	O
final	O
version	O
of	O
The	O
Dungeon	B-Application
of	O
Doom	O
was	O
released	O
as	O
a	O
free	O
demo	O
for	O
The	B-Operating_System
Dungeon	I-Operating_System
Revealed	I-Operating_System
in	O
1987	O
.	O
</s>
<s>
Both	O
games	O
were	O
released	O
for	O
Mac	B-Application
OS	I-Application
and	O
were	O
compatible	O
with	O
versions	O
as	O
late	O
as	O
System	B-Operating_System
7	I-Operating_System
.	O
</s>
<s>
The	O
player	O
controls	O
a	O
single	O
character	O
trapped	O
in	O
an	O
underground	O
dungeon	B-Application
.	O
</s>
<s>
If	O
the	O
character	O
attempts	O
to	O
take	O
the	O
stairs	O
from	O
the	O
dungeon	B-Application
,	O
a	O
message	O
appears	O
:	O
"	O
A	O
force	O
prevents	O
you	O
from	O
escaping	O
to	O
the	O
surface	O
.	O
</s>
<s>
The	O
dungeon	B-Application
is	O
divided	O
into	O
40	O
floors	O
,	O
each	O
with	O
one	O
staircase	O
going	O
up	O
and	O
one	O
going	O
down	O
.	O
</s>
<s>
The	O
floor	B-Application
plan	I-Application
of	O
each	O
level	O
is	O
randomly	O
generated	O
but	O
remains	O
unchanged	O
throughout	O
a	O
single	O
game	O
.	O
</s>
<s>
Though	O
each	O
level	O
is	O
about	O
the	O
same	O
size	O
,	O
the	O
complexity	O
of	O
the	O
floor	B-Application
plans	I-Application
becomes	O
more	O
maze-like	B-Application
as	O
the	O
character	O
descends	O
to	O
deeper	O
dungeon	B-Application
levels	O
.	O
</s>
<s>
There	O
are	O
also	O
items	O
,	O
including	O
weapons	O
,	O
armor	O
,	O
magical	O
rings	O
,	O
scrolls	O
,	O
potions	O
,	O
wands	O
,	O
food	O
items	O
,	O
and	O
jewels	B-Operating_System
placed	O
randomly	O
throughout	O
the	O
dungeon	B-Application
's	O
floors	O
.	O
</s>
<s>
Progress	O
through	O
the	O
dungeon	B-Application
is	O
hindered	O
by	O
monsters	O
who	O
,	O
depending	O
on	O
the	O
circumstances	O
,	O
have	O
varying	O
levels	O
of	O
hostility	O
towards	O
the	O
character	O
.	O
</s>
<s>
The	O
monsters	O
become	O
more	O
powerful	O
and	O
resistant	O
to	O
attack	O
as	O
the	O
player	O
progresses	O
deeper	O
into	O
the	O
dungeon	B-Application
.	O
</s>
<s>
The	O
player	O
begins	O
the	O
game	O
by	O
creating	O
a	O
new	O
character	O
from	O
one	O
of	O
seven	O
classes	O
:	O
knight	O
,	O
fighter	O
,	O
sage	O
,	O
wizard	O
,	O
alchemist	B-Language
,	O
jeweler	O
,	O
and	O
jones	O
.	O
</s>
<s>
Each	O
class	O
has	O
a	O
different	O
set	O
of	O
attributes	O
,	O
parameterized	O
similarly	O
to	O
Dungeons	B-Application
&	O
Dragons	O
,	O
although	O
the	O
physical	O
classes	O
of	O
knight	O
and	O
fighter	O
are	O
best	O
as	O
players	O
will	O
constantly	O
have	O
to	O
fight	O
to	O
stay	O
alive	O
,	O
whereas	O
the	O
ability	O
to	O
assess	O
a	O
potion	O
,	O
scroll	O
,	O
ring	O
etc	O
.	O
</s>
<s>
Characters	O
with	O
a	O
high	O
intelligence	O
attribute	O
,	O
for	O
example	O
,	O
have	O
a	O
higher	O
probability	O
of	O
success	O
when	O
casting	O
magic	O
spells	O
from	O
a	O
scroll	O
as	O
well	O
as	O
an	O
improved	O
ability	O
to	O
map	O
the	O
dungeon	B-Application
.	O
</s>
<s>
Alchemists	O
,	O
for	O
example	O
,	O
can	O
accurately	O
identify	O
the	O
potions	O
they	O
find	O
in	O
the	O
dungeon	B-Application
and	O
therefore	O
avoid	O
drinking	O
those	O
with	O
harmful	O
effects	O
;	O
wizards	O
wield	O
wands	O
more	O
effectively	O
;	O
and	O
so	O
forth	O
.	O
</s>
<s>
John	O
Raymonds	O
wrote	O
The	O
Dungeon	B-Application
of	O
Doom	O
to	O
teach	O
himself	O
C	B-Language
and	O
because	O
he	O
was	O
disappointed	O
with	O
the	O
Macintosh	O
port	O
of	O
Ultima	B-Application
II	I-Application
.	O
</s>
<s>
He	O
originally	O
released	O
The	O
Dungeon	B-Application
of	O
Doom	O
as	O
shareware	B-License
in	O
1985	O
,	O
but	O
had	O
received	O
virtually	O
no	O
payments	O
by	O
1987	O
despite	O
the	O
game	O
's	O
popularity	O
.	O
</s>
<s>
Raymonds	O
abandoned	O
the	O
shareware	B-License
model	O
and	O
released	O
an	O
upgraded	O
commercial	O
version	O
of	O
the	O
game	O
published	O
by	O
Woodrose	O
Editions	O
in	O
1987	O
,	O
retitled	O
The	B-Operating_System
Dungeon	I-Operating_System
Revealed	I-Operating_System
.	O
</s>
<s>
Raymonds	O
released	O
a	O
final	O
version	O
5.4	O
of	O
The	O
Dungeon	B-Application
of	O
Doom	O
in	O
1987	O
that	O
changed	O
no	O
code	O
from	O
the	O
previous	O
version	O
4.0	O
released	O
in	O
1986	O
but	O
reclassified	O
The	O
Dungeon	B-Application
of	O
Doom	O
as	O
a	O
free	O
demo	O
for	O
The	B-Operating_System
Dungeon	I-Operating_System
Revealed	I-Operating_System
.	O
</s>
<s>
Macworld	O
inducted	O
The	O
Dungeon	B-Application
of	O
Doom	O
into	O
the	O
1987	O
Macworld	O
Game	O
Hall	O
of	O
Fame	O
in	O
the	O
Role-Playing	O
Game	O
category	O
,	O
ahead	O
of	O
runner-up	O
The	B-Application
Seven	I-Application
Cities	I-Application
of	I-Application
Gold	I-Application
.	O
</s>
<s>
Macworld	O
also	O
named	O
The	O
Dungeon	B-Application
of	O
Doom	O
the	O
"	O
Best	O
Implementation	O
of	O
Rogue	B-Application
and	O
2-D	O
Maze	B-Application
Game	O
"	O
as	O
part	O
of	O
its	O
Shareware	B-License
and	O
Public	O
Domain	O
Game	O
Awards	O
in	O
1987	O
.	O
</s>
<s>
MacUser	O
rated	O
The	O
Dungeon	B-Application
of	O
Doom	O
4	O
out	O
of	O
5	O
,	O
calling	O
it	O
a	O
"	O
standard	O
adventure	O
in	O
the	O
Ultima-series	O
genre.	O
"	O
</s>
