<s>
Thud	B-Application
Ridge	I-Application
:	I-Application
American	I-Application
Aces	I-Application
in	I-Application
'	I-Application
Nam	I-Application
is	O
a	O
computer	O
game	O
published	O
by	O
Three-Sixty	O
Pacific	O
in	O
1988	O
for	O
the	O
Commodore	O
64	O
and	O
MS-DOS	B-Application
.	O
</s>
<s>
Thud	B-Application
Ridge	I-Application
is	O
a	O
combat	O
flight	O
simulator	O
that	O
allows	O
the	O
player	O
to	O
pilot	O
a	O
Republic	O
F-105	O
Thunderchief	O
—	O
a	O
"	O
Thud	O
"	O
—	O
during	O
the	O
Vietnam	O
War	O
.	O
</s>
<s>
Thud	B-Application
Ridge	I-Application
presents	O
10	O
missions	O
,	O
with	O
the	O
degree	O
of	O
simulation	O
difficulty	O
decided	O
by	O
selecting	O
either	O
Lieutenant	O
,	O
Captain	O
,	O
or	O
Colonel	O
level	O
.	O
</s>
