<s>
Ninja	B-Application
is	O
a	O
beat	B-Application
'	I-Application
em	I-Application
up	I-Application
game	I-Application
developed	O
by	O
Sculptured	O
Software	O
and	O
released	O
by	O
Mastertronic	O
in	O
1986	O
for	O
the	O
Atari	B-Device
8-bit	I-Device
family	I-Device
,	O
Commodore	O
64	O
,	O
and	O
ZX	B-Operating_System
Spectrum	I-Operating_System
,	O
then	O
in	O
1987	O
for	O
the	O
Amstrad	B-Device
CPC	I-Device
,	O
Amiga	B-Device
,	O
Atari	B-Device
ST	I-Device
,	O
and	O
MS-DOS	B-Application
.	O
</s>
<s>
An	O
arcade	B-Application
version	O
of	O
the	O
game	O
was	O
released	O
in	O
1987	O
for	O
Mastertronic	O
's	O
Arcadia	O
Systems	O
which	O
is	O
based	O
on	O
Amiga	B-Device
hardware	O
.	O
</s>
<s>
The	O
Amiga	B-Device
,	O
Atari	B-Device
ST	I-Device
,	O
and	O
Arcade	B-Application
versions	O
were	O
released	O
as	O
Ninja	B-Application
Mission	O
.	O
</s>
<s>
As	O
a	O
Ninja	B-Application
,	O
the	O
player	O
attacks	O
a	O
fortress	O
made	O
of	O
individual	O
fixed	O
screens	O
which	O
can	O
be	O
explored	O
non-linearly	O
.	O
</s>
<s>
Ninja	B-Application
was	O
written	O
by	O
Steve	O
Coleman	O
,	O
who	O
previously	O
created	O
the	O
Atari	B-Device
8-bit	I-Device
games	O
Rainbow	B-Application
Walker	I-Application
and	O
The	B-Application
Pharaoh	I-Application
's	I-Application
Curse	I-Application
.	O
</s>
<s>
The	O
player	O
controls	O
a	O
ninja	B-Application
who	O
has	O
to	O
penetrate	O
a	O
Japanese	O
fortress	O
by	O
fighting	O
enemy	O
ninjas	B-Application
with	O
karate	B-Application
moves	O
and	O
by	O
throwing	O
shurikens	O
and	O
daggers	O
.	O
</s>
<s>
Ninja	B-Application
received	O
mixed	O
reviews	O
.	O
</s>
