<s>
Midnight	B-Application
Mutants	I-Application
is	O
an	O
action-adventure	O
game	O
for	O
the	O
Atari	B-General_Concept
7800	I-General_Concept
ProSystem	O
,	O
developed	O
by	O
Radioactive	O
Software	O
and	O
published	O
by	O
Atari	O
Corporation	O
in	O
1990	O
.	O
</s>
<s>
The	O
game	O
,	O
along	O
with	O
Sentinel	O
,	O
was	O
one	O
of	O
the	O
last	O
releases	O
by	O
Atari	O
for	O
the	O
Atari	B-General_Concept
7800	I-General_Concept
.	O
</s>
<s>
As	O
with	O
similar	O
games	O
of	O
that	O
era	O
,	O
Midnight	B-Application
Mutants	I-Application
features	O
a	O
large	O
in-game	O
environment	O
with	O
many	O
locations	O
,	O
a	O
background	O
musical	O
soundtrack	O
,	O
battles	O
against	O
boss	O
enemies	O
and	O
an	O
animated	O
introduction	O
.	O
</s>
<s>
On	O
Halloween	B-Application
night	O
in	O
1992	O
young	O
Jimmy	O
Harkman	O
's	O
grandfather	O
(	O
known	O
as	O
"	O
Grampa	O
"	O
)	O
has	O
been	O
imprisoned	O
inside	O
of	O
a	O
pumpkin	O
by	O
a	O
resurrected	O
villain	O
named	O
Dr.	O
</s>
<s>
Evil	O
,	O
who	O
is	O
taking	O
revenge	O
for	O
being	O
burned	O
at	O
the	O
stake	O
as	O
a	O
witch	O
by	O
their	O
ancestor	O
Johnathon	O
Harkman	O
on	O
Halloween	B-Application
night	O
in	O
1747	O
.	O
</s>
<s>
Jimmy	O
then	O
heads	O
on	O
a	O
Halloween	B-Application
quest	O
to	O
free	O
his	O
grandfather	O
.	O
</s>
<s>
With	O
Doctor	O
Evil	O
on	O
the	O
loose	O
,	O
Jimmy	O
finds	O
the	O
countryside	O
has	O
become	O
inhabited	O
by	O
scary	O
creatures	O
such	O
as	O
zombies	B-Application
and	O
werewolves	O
that	O
can	O
injure	O
him	O
physically	O
and	O
also	O
make	O
his	O
blood	O
impure	O
.	O
</s>
<s>
Midnight	B-Application
Mutants	I-Application
is	O
a	O
scrolling	O
action-adventure	O
game	O
with	O
a	O
horror	O
theme	O
.	O
</s>
<s>
In	O
a	O
retrospective	O
review	O
,	O
Atari	B-General_Concept
7800	I-General_Concept
Forever	O
gave	O
the	O
game	O
a	O
4.5	O
out	O
of	O
5	O
,	O
praising	O
the	O
humor	O
,	O
the	O
approachable	O
in-game	O
menus	O
and	O
the	O
excellent	O
boss	O
battles	O
.	O
</s>
