<s>
is	O
a	O
1988	O
action-strategy	O
arcade	O
game	O
later	O
ported	O
to	O
home	O
systems	O
.	O
</s>
<s>
In	O
Gain	B-Application
Ground	I-Application
,	O
players	O
control	O
one	O
of	O
a	O
set	O
of	O
characters	O
at	O
a	O
time	O
,	O
each	O
with	O
different	O
weapons	O
.	O
</s>
<s>
There	O
are	O
twenty	O
playable	O
characters	O
in	O
Gain	B-Application
Ground	I-Application
,	O
each	O
with	O
their	O
own	O
strengths	O
and	O
weaknesses	O
.	O
</s>
<s>
The	O
characters	O
in	O
Gain	B-Application
Ground	I-Application
also	O
vary	O
in	O
which	O
hand	O
they	O
hold	O
their	O
weapons	O
,	O
making	O
it	O
easier	O
for	O
some	O
characters	O
to	O
shoot	O
around	O
certain	O
walls	O
and	O
obstacles	O
than	O
others	O
.	O
</s>
<s>
"	O
Cyber	O
"	O
seems	O
to	O
be	O
directly	O
inspired	O
by	O
the	O
title	O
character	O
of	O
the	O
Robocop	B-Application
film	O
series	O
,	O
only	O
colored	O
red	O
instead	O
of	O
silver	O
.	O
</s>
<s>
The	O
"	O
General	O
"	O
has	O
been	O
noted	O
by	O
players	O
to	O
bear	O
more	O
than	O
a	O
passing	O
resemblance	O
to	O
Street	B-Application
Fighter	I-Application
series	O
villain	O
,	O
M	O
.	O
Bison	O
,	O
although	O
the	O
character	O
did	O
n't	O
appear	O
until	O
1992	O
after	O
this	O
game	O
's	O
release	O
.	O
</s>
<s>
From	O
a	O
Gain	B-Application
Ground	I-Application
flyer	O
:	O
</s>
<s>
The	O
Federated	O
Government	O
,	O
greatly	O
concerned	O
regarding	O
this	O
ever	O
increasing	O
dangerous	O
situation	O
,	O
developed	O
a	O
Gain	B-Application
Ground	I-Application
simulation	O
system	O
in	O
the	O
year	O
2348	O
in	O
an	O
effort	O
to	O
instigate	O
their	O
ever	O
waning	O
fighting	O
spirit	O
.	O
</s>
<s>
In	O
order	O
to	O
rescue	O
the	O
POWs	O
,	O
three	O
of	O
the	O
bravest	O
warriors	O
were	O
urgently	O
dispatched	O
to	O
go	O
forth	O
into	O
the	O
deadly	O
Gain	B-Application
Ground	I-Application
.	O
</s>
<s>
Gain	B-Application
Ground	I-Application
started	O
off	O
as	O
an	O
arcade	O
game	O
.	O
</s>
<s>
Released	O
in	O
Japan	O
,	O
the	O
United	O
States	O
and	O
Canada	O
in	O
1988	O
,	O
Gain	B-Application
Ground	I-Application
ran	O
on	O
the	O
Sega	O
System	O
24	O
architecture	O
.	O
</s>
<s>
The	O
developers	O
have	O
stated	O
that	O
their	O
original	O
inspiration	O
was	O
Gauntlet	B-Device
.	O
</s>
<s>
Gain	B-Application
Ground	I-Application
was	O
ported	O
to	O
the	O
Sega	O
Master	O
System	O
in	O
1990	O
and	O
the	O
Sega	B-Operating_System
Mega	I-Operating_System
Drive/Genesis	I-Operating_System
in	O
1991	O
.	O
</s>
<s>
In	O
1992	O
,	O
a	O
PC	B-General_Concept
Engine	I-General_Concept
Super	I-General_Concept
CD-ROM²	I-General_Concept
version	O
(	O
Gain	B-Application
Ground	I-Application
SX	I-Application
)	O
was	O
released	O
by	O
NEC	O
Avenue	O
.	O
</s>
<s>
II	O
TV	B-Device
Games	I-Device
compilation	O
.	O
</s>
<s>
In	O
2004	O
,	O
the	O
game	O
was	O
remade	O
for	O
the	O
PlayStation	B-Device
2	I-Device
as	O
part	O
of	O
Sega	O
's	O
Japan-only	O
Sega	O
Ages	O
2500	O
series	O
as	O
Sega	O
Ages	O
2500	O
Series	O
Vol	O
.	O
</s>
<s>
9	O
:	O
Gain	B-Application
Ground	I-Application
.	O
</s>
<s>
The	O
Mega	B-Operating_System
Drive/Genesis	I-Operating_System
version	O
was	O
released	O
on	O
the	O
European	O
and	O
Australian	O
Wii	B-Operating_System
Virtual	B-Application
Console	I-Application
on	O
February	O
2	O
,	O
2007	O
,	O
and	O
was	O
made	O
available	O
in	O
North	O
America	O
on	O
February	O
5	O
,	O
2007	O
.	O
</s>
<s>
Gain	B-Application
Ground	I-Application
was	O
included	O
in	O
Sega	B-Operating_System
Genesis	I-Operating_System
Collection	O
on	O
the	O
PlayStation	B-Device
2	I-Device
and	O
the	O
PSP	B-Operating_System
in	O
2006	O
and	O
in	O
Sonic	B-Application
's	I-Application
Ultimate	I-Application
Genesis	I-Application
Collection	I-Application
for	O
Xbox	B-Operating_System
360	I-Operating_System
and	O
PlayStation	B-Operating_System
3	I-Operating_System
in	O
2009	O
.	O
</s>
<s>
On	O
June	O
1	O
,	O
2010	O
,	O
the	O
game	O
became	O
available	O
on	O
Steam	B-Application
as	O
part	O
of	O
Sega	B-Operating_System
Mega	I-Operating_System
Drive	I-Operating_System
Classics	O
Pack	O
(	O
Sega	B-Operating_System
Genesis	I-Operating_System
Classics	O
in	O
the	O
United	O
States	O
)	O
.	O
</s>
<s>
On	O
May	O
29	O
,	O
2018	O
,	O
it	O
was	O
included	O
in	O
the	O
console	O
version	O
of	O
the	O
Mega	B-Operating_System
Drive/Genesis	I-Operating_System
Classics	O
Pack	O
.	O
</s>
<s>
As	O
a	O
tribute	O
to	O
the	O
game	O
,	O
Chapter	O
15	O
and	O
17	O
of	O
the	O
crossover	O
game	O
Project	B-Application
X	I-Application
Zone	I-Application
are	O
stages	O
directly	O
pulled	O
from	O
Gain	B-Application
Ground	I-Application
.	O
</s>
<s>
Chapter	O
15	O
's	O
title	O
is	O
"	O
Gain	B-Application
Ground	I-Application
System	O
"	O
and	O
both	O
stages	O
even	O
have	O
the	O
party	O
rescuing	O
three	O
of	O
their	O
companions	O
(	O
two	O
in	O
the	O
first	O
and	O
one	O
in	O
the	O
second	O
)	O
in	O
true	O
fashion	O
to	O
the	O
original	O
game	O
.	O
</s>
<s>
Incidentally	O
,	O
no	O
characters	O
from	O
Gain	B-Application
Ground	I-Application
actually	O
appear	O
in	O
the	O
crossover	O
.	O
</s>
<s>
Game	O
Machine	O
reports	O
that	O
Gain	B-Application
Ground	I-Application
was	O
among	O
the	O
most	O
popular	O
arcade	O
games	O
of	O
February	O
1989	O
.	O
</s>
<s>
IGN	O
's	O
Levi	O
Buchanan	O
ranked	O
Gain	B-Application
Ground	I-Application
as	O
the	O
fifth	O
top	O
Renovation	O
game	O
.	O
</s>
<s>
Complex	O
ranked	O
Gain	B-Application
Ground	I-Application
88th	O
on	O
their	O
"	O
The	O
100	O
Best	O
Sega	B-Operating_System
Genesis	I-Operating_System
Games.	O
"	O
</s>
