<s>
Sewer	B-Application
Shark	I-Application
is	O
a	O
first-person	O
rail	O
shooter	O
video	O
game	O
,	O
and	O
is	O
the	O
first	O
on	O
a	O
home	O
console	B-Device
to	O
use	O
full	B-Application
motion	I-Application
video	I-Application
for	O
its	O
primary	O
gameplay	O
.	O
</s>
<s>
It	O
was	O
originally	O
slated	O
to	O
be	O
the	O
flagship	O
product	O
in	O
Hasbro	O
's	O
Control-Vision	B-Device
video	O
game	O
system	O
,	O
which	O
would	O
use	O
VHS	O
tapes	O
as	O
its	O
medium	O
.	O
</s>
<s>
However	O
,	O
Hasbro	O
cancelled	O
the	O
Control-Vision	B-Device
platform	O
,	O
and	O
Digital	B-Algorithm
Pictures	I-Algorithm
later	O
developed	O
the	O
game	O
for	O
the	O
Sega	B-Device
CD	I-Device
expansion	O
unit	O
.	O
</s>
<s>
Sewer	B-Application
Shark	I-Application
is	O
one	O
of	O
the	O
first	O
titles	O
for	O
the	O
Sega	B-Device
CD	I-Device
and	O
one	O
of	O
its	O
best-selling	O
games	O
,	O
leading	O
Sega	O
to	O
eventually	O
bundle	O
it	O
with	O
Sega	B-Device
CD	I-Device
units	O
.	O
</s>
<s>
It	O
was	O
later	O
ported	O
and	O
released	O
for	O
the	O
3DO	B-Device
in	O
1994	O
.	O
</s>
<s>
A	O
port	O
was	O
also	O
planned	O
for	O
the	O
SNES-CD	B-Device
,	O
but	O
that	O
system	O
was	O
cancelled	O
.	O
</s>
<s>
Sewer	B-Application
Shark	I-Application
takes	O
place	O
in	O
a	O
post-apocalyptic	O
future	O
where	O
environmental	O
destruction	O
has	O
forced	O
most	O
of	O
humanity	O
to	O
live	O
underground	O
.	O
</s>
<s>
The	O
objective	O
of	O
Sewer	B-Application
Shark	I-Application
is	O
to	O
travel	O
all	O
the	O
way	O
from	O
the	O
home	O
base	O
to	O
Solar	O
City	O
without	O
crashing	O
or	O
running	O
out	O
of	O
energy	O
,	O
and	O
while	O
maintaining	O
a	O
satisfactory	O
level	O
of	O
performance	O
as	O
judged	O
by	O
Ghost	O
and	O
Commissioner	O
Stenchler	O
.	O
</s>
<s>
Sewer	B-Application
Shark	I-Application
is	O
often	O
referred	O
to	O
as	O
an	O
interactive	B-Application
movie	I-Application
due	O
to	O
its	O
use	O
of	O
full	B-Application
motion	I-Application
video	I-Application
to	O
convey	O
the	O
action	O
,	O
and	O
the	O
navigation	O
aspect	O
of	O
the	O
game	O
is	O
frequently	O
compared	O
to	O
Dragon	B-Application
's	I-Application
Lair	I-Application
,	O
since	O
turns	O
are	O
gates	O
that	O
the	O
player	O
must	O
pass	O
through	O
to	O
continue	O
playing	O
.	O
</s>
<s>
The	O
game	O
originated	O
on	O
the	O
cancelled	O
VHS-based	O
Control-Vision	B-Device
video	B-Device
game	I-Device
console	I-Device
.	O
</s>
<s>
In	O
converting	O
the	O
game	O
to	O
the	O
Sega	B-Device
CD	I-Device
platform	O
,	O
Digital	B-Algorithm
Pictures	I-Algorithm
maintained	O
this	O
approach	O
by	O
having	O
the	O
console	B-Device
read	O
all	O
four	O
tracks	O
worth	O
of	O
data	O
as	O
a	O
single	O
continuous	O
stream	O
to	O
minimize	O
seek	O
time	O
on	O
the	O
CD	O
.	O
</s>
<s>
To	O
work	O
within	O
the	O
console	B-Device
's	O
limitations	O
,	O
the	O
developers	O
wrote	O
a	O
custom	O
video	O
codec	B-General_Concept
to	O
highly	O
compress	O
the	O
data	O
streams	O
so	O
they	O
could	O
be	O
read	O
in	O
realtime	B-General_Concept
from	O
the	O
CD	O
.	O
</s>
<s>
This	O
codec	B-General_Concept
was	O
also	O
used	O
in	O
Night	B-Application
Trap	I-Application
and	O
the	O
Make	B-Application
My	I-Application
Video	I-Application
series	O
,	O
and	O
an	O
improved	O
version	O
was	O
later	O
used	O
in	O
Prize	B-Application
Fighter	I-Application
.	O
</s>
<s>
The	O
video	O
footage	O
in	O
Sewer	B-Application
Shark	I-Application
was	O
directed	O
by	O
visual	O
effects	O
artist	O
John	O
Dykstra	O
.	O
</s>
<s>
According	O
to	O
Digital	B-Algorithm
Pictures	I-Algorithm
president	O
Tom	O
Zito	O
,	O
Sewer	B-Application
Shark	I-Application
cost	O
$3	O
million	O
to	O
develop	O
.	O
</s>
<s>
Sewer	B-Application
Shark	I-Application
is	O
one	O
of	O
the	O
Sega	B-Device
CD	I-Device
's	O
best-selling	O
games	O
,	O
with	O
more	O
than	O
100,000	O
units	O
sold	O
prior	O
to	O
having	O
been	O
bundled	O
with	O
the	O
system	O
.	O
</s>
<s>
Over	O
500,000	O
copies	O
were	O
bundled	O
with	O
the	O
Sega	B-Device
CD	I-Device
,	O
while	O
non-bundled	O
copies	O
grossed	O
about	O
in	O
retail	O
sales.In	O
the	O
end	O
the	O
game	O
sold	O
more	O
than	O
750,000	O
copies	O
.	O
</s>
<s>
They	O
called	O
it	O
"	O
bizarre	O
and	O
wildly	O
entertaining	O
"	O
and	O
a	O
must-have	O
game	O
for	O
all	O
Sega	B-Device
CD	I-Device
owners	O
.	O
</s>
<s>
According	O
to	O
the	O
"	O
Review	O
Crew	O
"	O
retrospective	O
feature	O
on	O
DefunctGames	O
,	O
Sewer	B-Application
Shark	I-Application
received	O
generally	O
positive	O
reviews	O
among	O
most	O
of	O
the	O
major	O
game	O
magazines	O
at	O
the	O
time	O
.	O
</s>
<s>
The	O
site	O
quotes	O
GamePro	O
Magazine	O
as	O
saying	O
"	O
Sewer	B-Application
Shark	I-Application
is	O
an	O
awesome	O
hybrid	O
of	O
hot	O
shoot-em-up	O
video	O
game	O
action	O
and	O
state-of-the-art	O
CD	O
graphics	O
...	O
"	O
,	O
although	O
Electronic	O
Gaming	O
Monthly	O
gave	O
the	O
game	O
a	O
6	O
out	O
of	O
10	O
,	O
saying	O
:	O
"	O
Whoopie	O
!	O
</s>
<s>
Another	O
full	B-Application
motion	I-Application
video	I-Application
CD	O
game	O
with	O
no	O
plot	O
real	O
game	O
play	O
.	O
</s>
<s>
Entertainment	O
Weekly	O
wrote	O
that	O
"	O
it	O
is	O
one	O
of	O
the	O
first	O
games	O
to	O
incorporate	O
humans	O
in	O
live-action	O
,	O
full-motion	B-Application
video	I-Application
footage	O
.	O
</s>
<s>
Power	O
Unlimited	O
gave	O
a	O
score	O
of	O
78%	O
writing	O
:	O
"	O
Sewer	B-Application
Shark	I-Application
is	O
another	O
interactive	B-Application
movie	I-Application
that	O
took	O
advantage	O
of	O
the	O
capabilities	O
of	O
the	O
Sega	B-Device
CD	I-Device
.	O
</s>
