<s>
Pyramid	B-Application
of	I-Application
Doom	I-Application
is	O
a	O
text	O
adventure	O
game	O
written	O
by	O
Alvin	O
Files	O
and	O
published	O
by	O
Adventure	O
International	O
in	O
1979	O
.	O
</s>
<s>
The	O
player	O
faces	O
a	O
variety	O
of	O
challenges	O
,	O
such	O
as	O
an	O
angry	O
mummy	O
,	O
a	O
purple	O
worm	O
,	O
and	O
an	O
irate	O
desert	O
nomad	B-Application
.	O
</s>
