<s>
is	O
a	O
video	O
game	O
developed	O
by	O
Positron	O
and	O
published	O
by	O
Square	O
and	O
released	O
in	O
1999	B-Application
.	O
</s>
<s>
iS	O
:	O
internal	B-Application
section	I-Application
is	O
a	O
tube	O
shooter	O
,	O
in	O
the	O
same	O
vein	O
of	O
gameplay	O
as	O
Tempest	B-Application
2000	I-Application
and	O
N2O	B-Application
:	I-Application
Nitrous	I-Application
Oxide	I-Application
.	O
</s>
<s>
It	O
is	O
an	O
experimental	O
project	O
that	O
responds	O
to	O
its	O
16	O
built-in	O
tracks	O
,	O
or	O
even	O
your	O
own	O
music	B-Application
from	O
a	O
CD	O
.	O
</s>
<s>
The	O
graphics	O
in	O
the	O
game	O
feature	O
flat	O
shaded	O
models	O
,	O
and	O
the	O
players	O
ship	O
and	O
enemies	O
are	O
simple	O
polygon	B-General_Concept
shapes	O
.	O
</s>
<s>
The	O
game	O
has	O
a	O
default	O
techno	O
soundtrack	O
,	O
but	O
music	B-Application
from	O
a	O
compact	O
disk	O
can	O
be	O
added	O
to	O
the	O
game	O
.	O
</s>
<s>
iS	O
:	O
Internal	B-Application
section	I-Application
was	O
released	O
on	O
January	O
28	O
,	O
1999	B-Application
,	O
for	O
the	O
Sony	B-Device
PlayStation	I-Device
and	O
was	O
published	O
by	O
Square	O
.	O
</s>
<s>
It	O
has	O
also	O
never	O
been	O
re-released	O
for	O
the	O
PlayStation	B-Device
Network	O
's	O
Game	O
Archives	O
in	O
Japan	O
as	O
well	O
.	O
</s>
<s>
Later	O
,	O
a	O
track	O
from	O
the	O
game	O
was	O
later	O
released	O
in	O
the	O
compilation	O
CD	O
SQUARE	O
ENIX	O
BATTLE	O
TRACKS	O
Vol.3	O
SQUARE	O
1999	B-Application
-	O
2000	O
.	O
</s>
<s>
Gamers	O
 '	O
Republic	O
listed	O
the	O
game	O
in	O
the	O
1999	B-Application
Video	O
Game	O
Buyers	O
Guide	O
and	O
Y2K	O
Preview	O
as	O
one	O
of	O
the	O
best	O
games	O
to	O
import	O
from	O
Japan	O
that	O
year	O
along	O
with	O
such	O
games	O
as	O
,	O
Bangai-O	B-Application
,	O
Neon	B-Application
Genesis	I-Application
Evangelion	I-Application
,	O
Pepsiman	B-Application
,	O
Robot	O
Dandy	O
,	O
and	O
The	B-Application
Adventures	I-Application
of	I-Application
Little	I-Application
Ralph	I-Application
.	O
</s>
<s>
In	O
2015	O
,	O
Retro	O
Gamer	O
magazine	O
listed	O
it	O
as	O
number	O
5	O
on	O
their	O
list	O
of	O
"	O
The	O
20	O
Greatest	O
PlayStation	B-Device
Games	O
You	O
've	O
Never	O
Played	O
"	O
.	O
</s>
