<s>
Ninja	B-Application
:	I-Application
Shadow	I-Application
of	I-Application
Darkness	I-Application
is	O
an	O
action	B-Application
beat	B-Application
'	I-Application
em	I-Application
up	I-Application
platform	O
video	O
game	O
developed	O
by	O
Core	O
Design	O
and	O
published	O
by	O
Eidos	O
Interactive	O
for	O
the	O
PlayStation	B-Device
.	O
</s>
<s>
Though	O
Ninja	O
was	O
developed	O
immediately	O
following	O
the	O
popular	O
Tomb	B-Application
Raider	I-Application
,	O
Core	O
Design	O
did	O
not	O
want	O
to	O
be	O
restricted	O
to	O
the	O
Tomb	B-Application
Raider	I-Application
engine	O
's	O
interiors-only	O
nature	O
,	O
and	O
instead	O
built	O
the	O
game	O
engine	O
for	O
Ninja	B-Application
:	I-Application
Shadow	I-Application
of	I-Application
Darkness	I-Application
from	O
scratch	O
.	O
</s>
<s>
The	O
game	O
was	O
announced	O
for	O
release	O
in	O
August	O
1997	O
on	O
Sega	B-Device
Saturn	I-Device
,	O
PlayStation	B-Device
,	O
and	O
PC	B-Device
,	O
and	O
a	O
near-complete	O
beta	O
of	O
the	O
Saturn	B-Device
version	O
was	O
unveiled	O
at	O
this	O
time	O
.	O
</s>
<s>
The	O
PlayStation	B-Device
version	O
was	O
a	O
port	O
of	O
the	O
Saturn	B-Device
version	O
.	O
</s>
<s>
Mid-development	O
,	O
programmer	O
Derek	O
Leigh-Gilchrist	O
commented	O
that	O
the	O
port	O
"	O
has	O
involved	O
taking	O
a	O
lot	O
of	O
C	B-Language
code	I-Language
across	O
from	O
Saturn	B-Device
and	O
modifying	O
the	O
3D-specific	O
bits	O
to	O
use	O
the	O
GTE	O
[	O
Geometry	O
Transfer	O
Engine ]	O
.	O
</s>
<s>
This	O
all	O
worked	O
fine	O
,	O
but	O
it	O
still	O
was	O
n't	O
fast	O
enough	O
to	O
run	O
the	O
game	O
at	O
30	O
frames	O
per	O
second	O
,	O
so	O
I	O
then	O
converted	O
the	O
C	B-Language
code	I-Language
into	O
optimized	O
R3000	B-Device
assembler	O
with	O
inline	O
GTE	O
code	O
,	O
which	O
halved	O
the	O
processing	O
time	O
.	O
</s>
<s>
The	O
Saturn	B-Device
version	O
created	O
floor	O
surfaces	O
with	O
the	O
Saturn	B-Device
's	O
Mode	O
7-style	O
scaling	O
,	O
a	O
feature	O
unique	O
to	O
the	O
console	O
which	O
allows	O
it	O
to	O
perform	O
scaling	O
effects	O
without	O
burdening	O
the	O
CPU	O
with	O
geometry	O
calculations	O
,	O
whereas	O
the	O
PlayStation	B-Device
must	O
construct	O
floors	O
out	O
of	O
polygons	O
,	O
a	O
task	O
which	O
lowers	O
the	O
frame	O
rate	O
.	O
</s>
<s>
Using	O
the	O
resulting	O
performance	O
benefit	O
,	O
the	O
team	O
tagged	O
objects	O
in	O
the	O
Saturn	B-Device
version	O
with	O
depth-cues	O
,	O
allowing	O
them	O
to	O
create	O
transparency	O
effects	O
in	O
the	O
game	O
's	O
water	O
bodies	O
.	O
</s>
<s>
The	O
PlayStation	B-Device
version	O
was	O
delayed	O
for	O
over	O
a	O
year	O
,	O
and	O
the	O
Saturn	B-Device
and	O
PC	B-Device
versions	O
were	O
cancelled	O
entirely	O
.	O
</s>
<s>
The	O
game	O
received	O
mixed	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
GameRankings	O
.	O
</s>
<s>
Game	O
Informer	O
panned	O
the	O
game	O
for	O
its	O
bad	O
graphics	O
and	O
controls	O
and	O
not	O
having	O
a	O
story	O
,	O
and	O
recommended	O
to	O
play	O
Tenchu	B-Application
:	I-Application
Stealth	I-Application
Assassins	I-Application
instead	O
.	O
</s>
