<s>
is	O
a	O
run	O
and	O
gun	O
video	O
game	O
released	O
by	O
Sega	O
for	O
arcades	B-Application
in	O
1986	O
.	O
</s>
<s>
Quartet	B-Application
allows	O
one	O
to	O
four	O
players	O
to	O
guide	O
a	O
set	O
of	O
characters	O
through	O
a	O
base	O
taken	O
over	O
by	O
an	O
army	O
of	O
robots	B-Device
.	O
</s>
<s>
The	O
game	O
was	O
released	O
as	O
a	O
dedicated	O
four-player	O
cabinet	O
similar	O
to	O
Atari	O
Games	O
 '	O
Gauntlet	B-Device
.	O
</s>
<s>
A	O
2-players	O
version	O
,	O
titled	O
Quartet	B-Application
2	O
,	O
was	O
released	O
by	O
Sun	O
Electronics	O
,	O
as	O
a	O
conversion	O
kit	O
.	O
</s>
<s>
The	O
game	O
was	O
ported	O
to	O
the	O
Master	O
System	O
,	O
Commodore	O
64	O
,	O
Amstrad	B-Device
CPC	I-Device
,	O
and	O
ZX	B-Operating_System
Spectrum	I-Operating_System
.	O
</s>
<s>
In	O
Japan	O
,	O
Game	O
Machine	O
listed	O
Quartet	B-Application
on	O
their	O
May	O
1	O
,	O
1986	O
issue	O
as	O
being	O
the	O
second	O
most-successful	O
upright/cockpit	O
arcade	B-Application
unit	O
of	O
the	O
month	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
the	O
game	O
topped	O
the	O
Play	O
Meter	O
arcade	B-Application
earnings	O
chart	O
in	O
August	O
1986	O
.	O
</s>
