<s>
Greatest	B-Application
Heavyweights	I-Application
is	O
a	O
boxing	B-Application
video	O
game	O
that	O
was	O
published	O
by	O
Sega	O
in	O
1993	O
.	O
</s>
<s>
It	O
was	O
released	O
for	O
the	O
Sega	B-Operating_System
Genesis	I-Operating_System
console	O
.	O
</s>
<s>
It	O
is	O
a	O
follow-up	O
to	O
Evander	B-Application
Holyfield	I-Application
's	I-Application
Real	I-Application
Deal	I-Application
Boxing	I-Application
,	O
and	O
is	O
virtually	O
identical	O
in	O
many	O
ways	O
,	O
apart	O
from	O
a	O
number	O
of	O
significant	O
improvements	O
.	O
</s>
<s>
The	O
gameplay	O
of	O
the	O
game	O
is	O
very	O
similar	O
to	O
that	O
featured	O
in	O
Evander	B-Application
Holyfield	I-Application
's	I-Application
Real	I-Application
Deal	I-Application
Boxing	I-Application
.	O
</s>
<s>
The	O
game	O
uses	O
an	O
identical	O
'	O
attributes	O
 '	O
system	O
for	O
each	O
boxer	O
to	O
Evander	B-Application
Holyfield	I-Application
's	I-Application
Real	I-Application
Deal	I-Application
Boxing	I-Application
,	O
apart	O
from	O
one	O
change	O
:	O
the	O
attribute	O
"	O
defense	O
"	O
is	O
no	O
longer	O
present	O
.	O
</s>
<s>
An	O
improvement	O
over	O
Evander	B-Application
Holyfield	I-Application
's	I-Application
Real	I-Application
Deal	I-Application
Boxing	I-Application
is	O
that	O
the	O
player	O
now	O
has	O
many	O
more	O
colors	O
to	O
choose	O
from	O
when	O
determining	O
skin	O
and	O
hair	O
colour	O
for	O
their	O
fighter	O
.	O
</s>
<s>
Game	B-Device
Players	I-Device
gave	O
it	O
a	O
score	O
of	O
56%	O
in	O
their	O
February	O
1994	O
issue	O
.	O
</s>
