<s>
Pyramid	B-Application
2000	I-Application
is	O
an	O
interactive	O
fiction	O
game	O
.	O
</s>
<s>
The	O
game	O
is	O
an	O
altered	O
version	O
of	O
Colossal	B-Application
Cave	I-Application
that	O
takes	O
advantage	O
of	O
an	O
Egyptian	O
setting	O
,	O
re-theming	O
some	O
of	O
the	O
locations	O
,	O
objects	O
,	O
and	O
puzzles	O
.	O
</s>
<s>
For	O
instance	O
,	O
the	O
"	O
little	O
bird	O
"	O
from	O
Adventure	B-Application
is	O
now	O
a	O
"	O
bird	O
statue	O
"	O
and	O
the	O
"	O
clam	O
"	O
is	O
a	O
"	O
sarcophagus.	O
"	O
</s>
<s>
The	O
system	O
was	O
written	O
by	O
Robert	O
Arnstein	O
using	O
a	O
custom	O
p-code	B-Language
machine	I-Language
with	O
32	O
instructions	O
.	O
</s>
