<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
released	O
in	O
Japan	O
as	O
is	O
a	O
2000	O
action-adventure	O
stealth	O
video	O
game	O
developed	O
and	O
published	O
by	O
Konami	O
for	O
the	O
Game	B-Device
Boy	I-Device
Color	I-Device
.	O
</s>
<s>
The	O
game	O
began	O
development	O
after	O
Konami	O
Computer	O
Entertainment	O
Japan	O
were	O
commissioned	O
by	O
Konami	O
's	O
European	O
branch	O
to	O
develop	O
a	O
portable	O
adaptation	O
of	O
their	O
1998	O
PlayStation	B-Device
game	O
of	O
the	O
same	B-Application
title	I-Application
.	O
</s>
<s>
However	O
,	O
the	O
Game	B-Device
Boy	I-Device
Color	I-Device
version	O
is	O
not	O
a	O
port	O
of	O
the	O
original	B-Device
PlayStation	I-Device
version	O
,	O
nor	O
does	O
it	O
adapt	O
the	O
same	O
story	O
,	O
but	O
instead	O
takes	O
place	O
in	O
an	O
alternative	O
continuity	O
set	O
seven	O
years	O
after	O
the	O
events	O
of	O
the	O
original	O
Metal	B-Application
Gear	I-Application
(	O
1987	O
)	O
.	O
</s>
<s>
Ghost	B-Application
Babel	I-Application
follows	O
the	O
overhead	O
2D	O
format	O
used	O
in	O
the	O
1990	O
MSX2	B-Operating_System
game	O
Metal	B-Application
Gear	I-Application
2	I-Application
:	I-Application
Solid	I-Application
Snake	I-Application
while	O
adding	O
a	O
few	O
new	O
elements	O
introduced	O
in	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
.	O
</s>
<s>
One	O
difference	O
from	O
the	O
MSX2	B-Operating_System
games	O
is	O
that	O
the	O
screen	O
now	O
scrolls	O
when	O
Snake	O
moves	O
throughout	O
a	O
single	O
area	O
instead	O
of	O
using	O
flip-screens	O
.	O
</s>
<s>
Snake	O
now	O
has	O
the	O
ability	O
to	O
flatten	O
himself	O
into	O
walls	O
like	O
he	O
does	O
in	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
.	O
</s>
<s>
Like	O
in	O
previous	O
installments	O
,	O
the	O
player	O
communicates	O
with	O
various	O
allies	O
via	O
a	O
wireless	O
communication	O
device	O
(	O
the	O
Codec	B-Application
)	O
,	O
which	O
is	O
also	O
used	O
to	O
save	O
the	O
player	O
's	O
progress	O
.	O
</s>
<s>
Unlike	O
the	O
preceding	O
installments	O
,	O
Ghost	B-Application
Babel	I-Application
uses	O
a	O
stage-based	O
structure	O
,	O
with	O
a	O
total	O
of	O
13	O
stages	O
.	O
</s>
<s>
Much	O
like	O
in	O
the	O
original	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
the	O
player	O
's	O
overall	O
performance	O
is	O
graded	O
with	O
a	O
codename	O
after	O
completing	O
all	O
13	O
stages	O
,	O
with	O
the	O
codenames	O
varying	O
depending	O
on	O
the	O
difficulty	O
level	O
chosen	O
at	O
the	O
start	O
of	O
the	O
game	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
main	O
story	O
mode	O
,	O
Ghost	B-Application
Babel	I-Application
offers	O
the	O
following	O
alternate	O
game	O
modes	O
.	O
</s>
<s>
A	O
competitive	O
2-player	O
mode	O
that	O
requires	O
a	O
Game	B-Device
Link	I-Device
Cable	I-Device
,	O
along	O
with	O
an	O
additional	O
Game	B-Device
Boy	I-Device
Color	I-Device
unit	O
and	O
a	O
second	O
copy	O
of	O
the	O
game	O
cartridge	O
.	O
</s>
<s>
One	O
player	O
controls	O
Snake	O
in	O
his	O
standard	O
sneaking	B-Application
suit	I-Application
,	O
while	O
the	O
other	O
Snake	O
wears	O
a	O
red	O
sneaking	B-Application
suit	I-Application
.	O
</s>
<s>
Seven	O
years	O
after	O
the	O
Outer	B-Application
Heaven	I-Application
uprising	O
,	O
a	O
new	O
Metal	B-Application
Gear	I-Application
prototype	B-Application
(	O
codenamed	O
Gander	O
)	O
has	O
been	O
stolen	O
by	O
a	O
separatist	O
guerrilla	O
group	O
in	O
the	O
region	O
of	O
Gindra	O
in	O
Central	O
Africa	O
.	O
</s>
<s>
The	O
Gindra	O
Liberation	O
Front	O
(	O
or	O
GLF	O
)	O
,	O
led	O
by	O
the	O
mercenary	O
Augustine	O
Eguabon	O
,	O
plans	O
on	O
using	O
the	O
prototype	B-Application
as	O
a	O
means	O
of	O
achieving	O
victory	O
in	O
an	O
ongoing	O
civil	B-Application
war	I-Application
.	O
</s>
<s>
Solid	O
Snake	O
,	O
the	O
FOXHOUND	O
operative	O
responsible	O
for	O
the	O
destruction	O
of	O
the	O
original	O
Metal	B-Application
Gear	I-Application
seven	O
years	O
before	O
,	O
is	O
brought	O
back	O
from	O
his	O
retirement	O
in	O
Alaska	O
.	O
</s>
<s>
His	O
mission	O
is	O
to	O
infiltrate	O
the	O
group	O
's	O
headquarters	O
Galuade	O
,	O
the	O
fortress	O
that	O
was	O
formerly	O
Outer	B-Application
Heaven	I-Application
.	O
</s>
<s>
Christine	O
Jenner	O
,	O
a	O
surviving	O
member	O
of	O
the	O
Delta	B-Application
Force	I-Application
that	O
was	O
sent	O
before	O
him	O
to	O
retrieve	O
Gander	O
.	O
</s>
<s>
The	O
GLF	O
are	O
assisted	O
by	O
four	O
surviving	O
members	O
of	O
Black	O
Chamber	O
,	O
a	O
defunct	O
special	B-Application
forces	I-Application
unit	O
whose	O
members	O
are	O
given	O
animal-themed	O
codenames	O
similar	O
to	O
FOXHOUND	O
.	O
</s>
<s>
Joining	O
him	O
are	O
Slasher	O
Hawk	O
,	O
an	O
Australian	O
Aborigine	O
armed	O
with	O
two	O
giant	O
boomerangs	B-General_Concept
who	O
is	O
accompanied	O
in	O
battle	O
by	O
a	O
hawk	O
;	O
Marionette	O
Owl	O
,	O
a	O
former	O
serial	O
killer	O
endowed	O
with	O
owl-like	O
nocturnal	O
vision	O
and	O
attacks	O
with	O
his	O
two	O
bunraku	O
puppets	O
;	O
and	O
Pyro	O
Bison	O
,	O
a	O
pyromaniac	O
armed	O
with	O
a	O
specially	O
prepared	O
flamethrower	O
and	O
fuel	O
pack	O
.	O
</s>
<s>
As	O
Snake	O
goes	O
deeper	O
into	O
Galuade	O
and	O
confronts	O
each	O
member	O
of	O
Black	O
Chamber	O
,	O
he	O
uncovers	O
a	O
conspiracy	B-Application
involving	O
the	O
GLF	O
and	O
US	O
Government	O
.	O
</s>
<s>
IdeaSpy	O
2.5	O
is	O
a	O
bonus	O
13-part	O
story	O
written	O
by	O
Shuyo	O
Murata	O
featured	O
in	O
the	O
Japanese	O
and	O
European	O
versions	O
of	O
Ghost	B-Application
Babel	I-Application
.	O
</s>
<s>
The	O
player	O
has	O
access	O
to	O
this	O
story	O
by	O
going	O
to	O
the	O
CODEC	B-Application
screen	O
during	O
the	O
second	O
play-through	O
and	O
onward	O
by	O
contacting	O
frequency	O
140.07	O
on	O
each	O
stage	O
.	O
</s>
<s>
The	O
game	O
was	O
produced	O
under	O
the	O
request	O
of	O
Konami	O
's	O
European	O
division	O
to	O
release	O
a	O
Game	B-Device
Boy	I-Device
Color	I-Device
version	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
.	O
</s>
<s>
The	O
game	O
's	O
director	O
,	O
Shinta	O
Nojiri	O
,	O
would	O
later	O
go	O
on	O
to	O
direct	O
Metal	B-Application
Gear	I-Application
Acid	I-Application
and	O
its	O
sequel	O
,	O
Metal	B-Application
Gear	I-Application
Acid	I-Application
2	I-Application
,	O
both	O
released	O
for	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
,	O
while	O
character	O
designer	O
Ikuya	O
Nakamura	O
went	O
on	O
to	O
direct	O
the	O
Boktai	B-Application
series	O
on	O
Game	B-Device
Boy	I-Device
Advance	I-Device
and	O
Nintendo	B-Device
DS	I-Device
.	O
</s>
<s>
It	O
has	O
an	O
average	O
rating	O
of	O
95.61	O
%	O
at	O
GameRankings	O
,	O
making	O
it	O
the	O
best-rated	O
game	O
for	O
the	O
Game	B-Device
Boy	I-Device
Color	I-Device
on	O
the	O
site	O
.	O
</s>
<s>
Japanese	O
video	O
game	O
magazine	O
Famitsu	O
scored	O
Metal	B-Application
Gear	I-Application
:	I-Application
Ghost	I-Application
Babel	I-Application
a	O
31	O
out	O
of	O
40	O
.	O
</s>
<s>
Nintendo	B-Application
Power	I-Application
listed	O
it	O
as	O
the	O
11th	O
best	O
Game	O
Boy/Game	O
Boy	O
Color	O
video	O
game	O
,	O
praising	O
it	O
for	O
successfully	O
bringing	O
over	O
elements	O
from	O
the	O
three	O
dimensional	O
games	O
.	O
</s>
<s>
Ben	O
Reeves	O
from	O
Game	O
Informer	O
called	O
it	O
the	O
eighth	O
best	O
Game	B-Device
Boy	I-Device
game	O
and	O
considered	O
it	O
a	O
good	O
throwback	O
to	O
the	O
MSX2	B-Operating_System
.	O
</s>
<s>
GamesRadar	O
listed	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
for	O
Game	B-Device
Boy	I-Device
Color	I-Device
as	O
one	O
of	O
the	O
titles	O
they	O
would	O
like	O
to	O
see	O
on	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
Virtual	B-Application
Console	I-Application
.	O
</s>
<s>
Indie	O
video	O
game	O
developer	O
Butterfly	O
,	O
stated	O
that	O
the	O
overall	O
feel	O
and	O
aesthetic	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
for	O
Game	B-Device
Boy	I-Device
Color	I-Device
inspired	O
their	O
Nintendo	B-Operating_System
3DS	I-Operating_System
game	O
Gal	O
Galaxy	O
Pain	O
.	O
</s>
