<s>
is	O
a	O
2001	O
action-adventure	O
stealth	O
video	O
game	O
developed	O
by	O
Konami	O
Computer	O
Entertainment	O
Japan	O
and	O
published	O
by	O
Konami	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
Originally	O
released	O
on	O
November	O
13	O
,	O
2001	O
,	O
it	O
is	O
the	O
fourth	O
Metal	B-Application
Gear	I-Application
game	O
produced	O
by	O
Hideo	O
Kojima	O
,	O
the	O
seventh	O
overall	O
game	O
in	O
the	O
series	O
and	O
is	O
a	O
sequel	O
to	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
(	O
1998	O
)	O
.	O
</s>
<s>
An	O
expanded	O
edition	O
,	O
titled	O
was	O
released	O
the	O
following	O
year	O
for	O
Xbox	B-Application
and	O
Windows	O
in	O
addition	O
to	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
A	O
remastered	O
version	O
of	O
the	O
game	O
was	O
later	O
included	O
in	O
the	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
HD	I-Application
Collection	I-Application
for	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
,	O
PlayStation	B-Device
Vita	I-Device
,	O
and	O
Xbox	B-Operating_System
360	I-Operating_System
.	O
</s>
<s>
The	O
motives	O
and	O
identities	O
of	O
many	O
of	O
the	O
antagonists	O
and	O
allies	O
change	O
throughout	O
the	O
course	O
of	O
the	O
game	O
,	O
as	O
the	O
protagonists	O
discover	O
a	O
world-shaking	O
conspiracy	O
constructed	O
by	O
a	O
powerful	O
organization	O
known	O
as	O
the	O
Patriots	B-Application
.	O
</s>
<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
received	O
acclaim	O
for	O
its	O
gameplay	O
,	O
graphics	O
,	O
and	O
attention	O
to	O
detail	O
.	O
</s>
<s>
However	O
,	O
critics	O
were	O
initially	O
divided	O
on	O
the	O
protagonist	O
and	O
the	O
philosophical	O
nature	O
and	O
execution	O
of	O
the	O
game	O
's	O
storyline	O
,	O
which	O
explores	O
themes	O
such	O
as	O
the	O
Information	O
Age	O
,	O
memetics	O
,	O
social	O
engineering	O
,	O
political	O
conspiracies	O
,	O
censorship	O
,	O
artificial	B-Application
intelligence	I-Application
,	O
existentialism	O
,	O
postmodernism	O
,	O
virtual	B-Application
reality	I-Application
,	O
and	O
the	O
internal	O
struggle	O
of	O
freedom	O
of	O
thought	O
.	O
</s>
<s>
The	O
game	O
is	O
often	O
considered	O
ahead	O
of	O
its	O
time	O
for	O
dealing	O
with	O
themes	O
and	O
concepts	O
,	O
such	O
as	O
post-truth	O
politics	O
,	O
fake	O
news	O
,	O
alternative	O
facts	O
,	O
synthetic	B-General_Concept
media	I-General_Concept
,	O
and	O
echo	O
chambers	O
,	O
that	O
became	O
culturally	O
relevant	O
in	O
the	O
2010s	O
.	O
</s>
<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
carries	O
the	O
subtitle	O
of	O
"	O
Tactical	B-Application
Espionage	I-Application
Action	I-Application
,	O
"	O
and	O
most	O
of	O
the	O
game	O
involves	O
the	O
protagonist	O
sneaking	O
around	O
avoiding	O
being	O
seen	O
by	O
the	O
enemies	O
.	O
</s>
<s>
The	O
corner-press	O
move	O
from	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
which	O
allowed	O
players	O
a	O
sneak	O
peek	O
around	O
the	O
next	O
bend	O
is	O
expanded	O
to	O
allow	O
players	O
to	O
fire	O
from	O
cover	O
.	O
</s>
<s>
In	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
,	O
the	O
enemy	O
guards	O
are	O
given	O
more	O
advanced	O
AI	B-Application
"	O
to	O
prevent	O
an	O
imbalance	O
of	O
power	O
,	O
"	O
and	O
unlike	O
the	O
original	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
work	O
in	O
squads	O
.	O
</s>
<s>
The	O
game	O
has	O
a	O
collective	O
enemy	O
AI	B-Application
,	O
where	O
enemy	O
guards	O
work	O
together	O
in	O
squads	O
,	O
can	O
communicate	O
with	O
one	O
another	O
,	O
and	O
react	O
more	O
realistically	O
towards	O
the	O
player	O
.	O
</s>
<s>
The	O
game	O
's	O
enemy	O
AI	B-Application
was	O
considered	O
one	O
of	O
the	O
best	O
in	O
gaming	O
for	O
many	O
years	O
.	O
</s>
<s>
The	O
game	O
expanded	O
its	O
predecessor	B-Application
's	O
cover	O
mechanic	O
,	O
with	O
Solid	O
Snake	O
or	O
Raiden	O
able	O
to	O
take	O
cover	O
behind	O
walls	O
or	O
objects	O
and	O
pop	O
out	O
to	O
shoot	O
at	O
enemies	O
,	O
while	O
the	O
improved	O
enemy	O
AI	B-Application
allowed	O
enemies	O
to	O
also	O
take	O
cover	O
from	O
the	O
player	O
character	O
.	O
</s>
<s>
Boss	O
battles	O
and	O
set-pieces	O
remain	O
a	O
case	O
of	O
finding	O
a	B-Application
strategy	I-Application
that	O
bypasses	O
the	O
defenses	O
of	O
the	O
enemy	O
.	O
</s>
<s>
However	O
,	O
in	O
a	O
major	O
break	O
from	O
action	B-Application
game	I-Application
standards	O
,	O
it	O
is	O
also	O
possible	O
to	O
clear	O
the	O
entire	O
game	O
,	O
including	O
boss	O
fights	O
,	O
without	O
causing	O
a	O
single	O
deliberate	O
death	O
,	O
through	O
use	O
of	O
tranquilizer	O
guns	O
,	O
stun	O
grenades	O
,	O
and	O
melee	O
attacks	O
.	O
</s>
<s>
Sons	O
of	O
Liberty	O
takes	O
place	O
within	O
an	O
alternate	O
history	O
of	O
events	O
,	O
in	O
which	O
the	O
Cold	B-Application
War	I-Application
ended	O
during	O
the	O
late	O
1990s	O
.	O
</s>
<s>
The	O
game	O
's	O
story	O
focuses	O
on	O
two	O
narratives	O
that	O
occur	O
around	O
and	O
near	O
New	O
York	O
City	O
the	O
first	O
in	O
2007	O
,	O
two	O
years	O
after	O
the	O
events	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
;	O
and	O
the	O
second	O
in	O
2009	O
.	O
</s>
<s>
The	O
main	O
protagonist	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
is	O
a	O
young	O
rookie	O
agent	O
named	O
Raiden	O
.	O
</s>
<s>
In	O
2007	O
,	O
Solid	O
Snake	O
infiltrates	O
a	O
tanker	O
carrying	O
a	O
new	O
Metal	B-Application
Gear	I-Application
model	O
,	O
RAY	O
.	O
</s>
<s>
Raiden	O
shoots	O
down	O
the	O
Harrier	O
,	O
but	O
"	O
Solid	O
Snake	O
"	O
escapes	O
with	O
the	O
stolen	O
Metal	B-Application
Gear	I-Application
RAY	O
.	O
</s>
<s>
Johnson	O
reveals	O
to	O
Raiden	O
the	O
United	O
States	O
 '	O
democratic	O
process	O
is	O
a	O
sham	O
staged	O
by	O
an	O
organization	O
called	O
"	O
the	O
Patriots	B-Application
"	O
,	O
who	O
secretly	O
rule	O
the	O
country	O
.	O
</s>
<s>
Furthermore	O
,	O
the	O
Big	O
Shell	O
is	O
a	O
facade	O
to	O
hide	O
Arsenal	O
Gear	O
,	O
a	O
submersible	O
mobile	O
fortress	O
that	O
houses	O
an	O
AI	B-Application
called	O
"	O
GW	O
"	O
.	O
</s>
<s>
He	O
explains	O
the	O
leader	O
of	O
Dead	O
Cell	O
is	O
his	O
predecessor	B-Application
George	O
Sears	O
,	O
a	O
clone	O
of	O
Big	O
Boss	O
known	O
as	O
Solidus	O
Snake	O
,	O
who	O
plans	O
to	O
seize	O
Arsenal	O
and	O
overthrow	O
the	O
Patriots	B-Application
.	O
</s>
<s>
Solidus	O
leaves	O
and	O
Olga	O
frees	O
Raiden	O
,	O
explaining	O
she	O
is	O
a	O
Patriot	B-Application
double-agent	O
forced	O
to	O
aid	O
Raiden	O
in	O
exchange	O
for	O
her	O
child	O
's	O
safety	O
.	O
</s>
<s>
Rose	O
tells	O
Raiden	O
she	O
had	O
been	O
ordered	O
by	O
the	O
Patriots	B-Application
to	O
become	O
his	O
lover	O
and	O
spy	O
on	O
him	O
,	O
and	O
that	O
she	O
is	O
pregnant	O
with	O
his	O
child	O
.	O
</s>
<s>
Fortune	O
battles	O
Snake	O
,	O
while	O
Raiden	O
is	O
forced	O
into	O
battle	O
with	O
AI-controlled	O
Metal	B-Application
Gear	I-Application
RAYs	O
.	O
</s>
<s>
Ocelot	O
reveals	O
himself	O
to	O
be	O
a	O
Patriot	B-Application
agent	O
and	O
that	O
the	O
entire	O
affair	O
was	O
orchestrated	O
by	O
the	O
Patriots	B-Application
to	O
artificially	O
replicate	O
a	O
soldier	O
(	O
Raiden	O
)	O
on	O
par	O
with	O
Solid	O
Snake	O
,	O
titled	O
the	O
S3	O
Plan	O
.	O
</s>
<s>
Liquid	O
explains	O
that	O
Ocelot	O
's	O
severed	O
right	O
arm	O
was	O
replaced	O
with	O
his	O
own	O
,	O
and	O
plans	O
to	O
hunt	O
down	O
the	O
Patriots	B-Application
using	O
his	O
host	O
's	O
knowledge	O
and	O
the	O
stolen	O
RAY	O
.	O
</s>
<s>
Raiden	O
is	O
contacted	O
by	O
an	O
AI	B-Application
impersonating	O
the	O
Colonel	O
and	O
Rose	O
.	O
</s>
<s>
It	O
states	O
that	O
GW	O
was	O
the	O
only	O
AI	B-Application
destroyed	O
,	O
and	O
that	O
the	O
S3	O
Plan	O
's	O
real	O
purpose	O
is	O
to	O
control	O
human	O
thought	O
to	O
prevent	O
society	O
's	O
regression	O
in	O
the	O
digital	O
era	O
from	O
trivial	O
information	O
drowning	O
knowledge	O
and	O
truth	O
.	O
</s>
<s>
Snake	O
and	O
Otacon	O
plan	O
to	O
rescue	O
Olga	O
's	O
child	O
,	O
and	O
locate	O
the	O
Patriots	B-Application
,	O
whose	O
details	O
were	O
hidden	O
in	O
the	O
GW	O
virus	O
disc	O
.	O
</s>
<s>
In	O
the	O
epilogue	O
,	O
having	O
decoded	O
the	O
disc	O
,	O
Otacon	O
and	O
Snake	O
find	O
it	O
contains	O
data	O
on	O
all	O
twelve	O
members	O
of	O
the	O
Patriots	B-Application
 '	O
highest	O
council	O
,	O
the	B-Application
Wiseman	I-Application
's	I-Application
Committee	I-Application
.	O
</s>
<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
is	O
often	O
considered	O
the	O
first	O
example	O
of	O
a	O
postmodern	O
video	O
game	O
and	O
has	O
often	O
been	O
cited	O
as	O
a	O
primary	O
example	O
of	O
artistic	O
expression	O
in	O
video	O
games	O
.	O
</s>
<s>
The	O
storyline	O
explored	O
many	O
social	O
,	O
philosophical	O
and	O
cyberpunk	O
themes	O
in	O
significant	O
detail	O
,	O
including	O
meme	O
theory	O
,	O
social	O
engineering	O
,	O
sociology	O
,	O
artificial	B-Application
intelligence	I-Application
,	O
information	O
control	O
,	O
fifth-generation	O
warfare	O
,	O
conspiracy	O
theories	O
,	O
political	O
and	O
military	O
maneuvering	O
,	O
evolution	O
,	O
existentialism	O
,	O
censorship	O
,	O
the	O
nature	O
of	O
reality	O
,	O
the	O
Information	O
Age	O
,	O
virtual	B-Application
reality	I-Application
,	O
child	O
exploitation	O
,	O
taboos	O
such	O
as	O
incest	O
,	O
sexual	O
orientation	O
,	O
and	O
the	O
moral	O
dilemma	O
between	O
security	O
and	O
personal	O
liberty	O
.	O
</s>
<s>
MGS2	O
,	O
along	O
with	O
its	O
predecessor	B-Application
,	O
has	O
been	O
featured	O
in	O
the	O
Smithsonian	O
American	O
Art	O
Museum	O
's	O
exhibition	O
,	O
The	O
Art	O
of	O
Video	O
Games	O
,	O
in	O
2012	O
.	O
</s>
<s>
Jeremy	O
Parish	O
of	O
1UP.com	O
notes	O
that	O
"	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
is	O
a	O
game	O
built	O
on	O
misinformation	O
"	O
and	O
that	O
it	O
"	O
was	O
simply	O
too	O
avant-gardetoo	O
cleverfor	O
its	O
own	O
good.	O
"	O
</s>
<s>
The	O
game	O
has	O
been	O
described	O
as	O
"	O
profound	O
,	O
"	O
particularly	O
the	O
final	O
dialogue	O
scene	O
between	O
Raiden	O
and	O
the	O
AI	B-Application
posing	O
as	O
the	O
Colonel	O
and	O
Rose	O
.	O
</s>
<s>
In	O
2011	O
,	O
Dugan	O
Patrick	O
of	O
Gamasutra	O
drew	O
comparisons	O
to	O
social	O
media	O
and	O
social	O
gaming	O
,	O
and	O
found	O
that	O
the	O
game	O
predicted	O
elements	O
of	O
Facebook	B-Application
,	O
such	O
as	O
allowing	O
"	O
people	O
to	O
intentionally	O
censor	O
their	O
own	O
experience	O
within	O
the	O
self-curated	O
walls	O
of	O
Facebook.	O
"	O
</s>
<s>
In	O
2016	O
,	O
Alex	O
Wiltshire	O
of	O
Glixel	O
found	O
the	O
game	O
to	O
be	O
"	O
strangely	O
prescient	O
of	O
not	O
only	O
its	O
own	O
time	O
but	O
also	O
today	O
,	O
"	O
noting	O
how	O
it	O
dodged	O
"	O
truth	O
at	O
every	O
turn	O
"	O
and	O
comparing	O
it	O
to	O
post-truth	O
politics	O
,	O
Facebook	B-Application
's	O
curated	O
News	B-Application
Feed	I-Application
,	O
and	O
the	O
2016	O
United	O
States	O
presidential	O
election	O
.	O
</s>
<s>
According	O
to	O
Cameron	O
Kunzelman	O
of	O
Vice	O
,	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
is	O
still	O
politically	O
relevant	O
in	O
2017	O
.	O
</s>
<s>
In	O
March	O
2018	O
,	O
GamesRadar	O
drew	O
comparisons	O
to	O
recent	O
political	O
events	O
including	O
the	B-Application
Facebook	I-Application
–	O
Cambridge	O
Analytica	O
data	O
scandal	O
and	O
the	O
investigations	O
involving	O
Russian	O
interference	O
in	O
the	O
2016	O
United	O
States	O
elections	O
.	O
</s>
<s>
IGN	O
said	O
its	O
"	O
fourth-wall-obliterating	O
final	O
act	O
posed	O
a	O
number	O
of	O
terrifying	O
questions	O
about	O
the	O
overload	O
of	O
data	O
in	O
the	O
information	O
age	O
,	O
and	O
how	O
technology	O
has	O
led	O
to	O
an	O
increasingly	O
shaky	O
definition	O
"	O
of	O
"	O
reality	O
,	O
"	O
and	O
has	O
drawn	O
comparisons	O
to	O
deep	B-Application
fakes	I-Application
,	O
machine	O
learning	O
,	O
and	O
information	O
warfare	O
.	O
</s>
<s>
It	O
mentioned	O
that	O
the	O
game	O
was	O
originally	O
going	O
to	O
be	O
called	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
III	I-Application
to	O
symbolize	O
Manhattan	O
's	O
three	O
tallest	O
skyscrapers.	O
"	O
</s>
<s>
The	O
document	O
outlines	O
new	O
game	O
mechanics	O
and	O
features	O
,	O
such	O
as	O
bodies	O
that	O
need	O
to	O
be	O
hidden	O
,	O
enemies	O
being	O
able	O
to	O
detect	O
shadows	O
,	O
lights	O
in	O
an	O
area	O
that	O
can	O
be	O
destroyed	O
to	O
affect	O
enemy	O
vision	O
,	O
realistic	O
enemy	O
AI	B-Application
that	O
relies	O
on	O
squad	O
tactics	O
rather	O
than	O
working	O
individually	O
,	O
and	O
multi-level	O
environments	O
that	O
add	O
an	O
element	O
of	O
"	O
vertical	O
tension	O
"	O
to	O
the	O
stealth	O
gameplay	O
.	O
</s>
<s>
The	O
document	O
stated	O
that	O
the	O
"	O
aim	O
of	O
the	O
story	O
"	O
involves	O
"	O
a	O
series	O
of	O
betrayals	O
and	O
sudden	O
reversals	O
,	O
to	O
the	O
point	O
where	O
the	O
player	O
is	O
unable	O
to	O
tell	O
fact	O
from	O
fiction	O
"	O
(	O
departing	O
from	O
the	O
"	O
very	O
clear	O
and	O
understandable	O
story	O
"	O
of	O
its	O
predecessor	B-Application
)	O
,	O
that	O
"	O
every	O
character	O
lies	O
to	O
(	O
betrays	O
)	O
someone	O
once	O
,	O
"	O
blurring	O
the	O
line	O
between	O
"	O
what	O
is	O
real	O
,	O
and	O
what	O
is	O
fantasy	O
,	O
"	O
and	O
"	O
ironies	O
aimed	O
at	O
the	O
digital	O
society	O
and	O
gaming	O
culture.	O
"	O
</s>
<s>
Kojima	O
states	O
that	O
when	O
he	O
"	O
heard	O
about	O
the	O
hardware	O
for	O
the	O
PlayStation	B-Device
2	I-Device
,	O
"	O
he	O
"	O
wanted	O
to	O
try	O
something	O
new	O
.	O
</s>
<s>
For	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
,	O
the	O
established	O
protagonist	O
of	O
Solid	O
Snake	O
was	O
only	O
made	O
playable	O
for	O
the	O
prologue	O
portion	O
of	O
the	O
game	O
.	O
</s>
<s>
Raiden	O
was	O
also	O
deliberately	O
designed	O
to	O
appeal	O
to	O
female	O
players	O
after	O
the	O
team	O
overheard	O
a	O
pair	O
of	O
female	O
debuggers	O
remark	O
that	O
the	O
more	O
middle-aged	O
protagonist	O
of	O
the	O
original	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
was	O
not	O
appealing	O
to	O
them	O
.	O
</s>
<s>
According	O
to	O
Kojima	O
in	O
the	O
documentary	O
Metal	B-Application
Gear	I-Application
Saga	O
Vol	O
.	O
</s>
<s>
1	O
,	O
the	O
original	O
plot	O
of	O
the	O
game	O
revolved	O
around	O
nuclear	O
weapon	O
inspections	O
in	O
Iraq	O
and	O
Iran	O
and	O
had	O
Solid	O
Snake	O
trying	O
to	O
stop	O
the	O
Metal	B-Application
Gear	I-Application
while	O
it	O
was	O
located	O
on	O
an	O
aircraft	O
carrier	O
,	O
in	O
a	O
certain	O
time	O
limit	O
,	O
while	O
trying	O
to	O
stop	O
Liquid	O
Snake	O
and	O
his	O
group	O
.	O
</s>
<s>
All	O
take	O
their	O
names	O
from	O
key	O
characters	O
in	O
the	O
book	O
,	O
and	O
all	O
three	O
would	O
have	O
turned	O
out	O
to	O
be	O
AIs	B-Application
.	O
</s>
<s>
Kojima	O
's	O
choice	O
of	O
composer	O
for	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
was	O
highly	O
publicized	O
in	O
the	O
run-up	O
to	O
the	O
game	O
's	O
release	O
,	O
with	O
him	O
deciding	O
upon	O
Harry	O
Gregson-Williams	O
,	O
a	O
film	O
composer	O
from	O
Hans	O
Zimmer	O
's	O
studio	O
,	O
after	O
watching	O
The	O
Replacement	O
Killers	O
with	O
sound	O
director	O
Kazuki	O
Muraoka	O
.	O
</s>
<s>
Gregson-Williams	O
also	O
arranged	O
and	O
re-orchestrated	O
the	O
original	O
"	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
Main	O
Theme	O
"	O
for	O
use	O
in	O
the	O
game	O
's	O
opening	O
title	O
sequence	O
.	O
</s>
<s>
Norihiko	O
Hibino	O
,	O
who	O
had	O
worked	O
on	O
previous	O
Konami	O
games	O
such	O
as	O
Metal	B-Application
Gear	I-Application
:	I-Application
Ghost	I-Application
Babel	I-Application
,	O
was	O
responsible	O
for	O
the	O
in-game	O
music	O
.	O
</s>
<s>
As	O
with	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
the	O
cutscene	O
music	O
includes	O
orchestral	O
and	O
choir	O
pieces	O
,	O
while	O
the	O
in-game	O
soundtrack	O
is	O
scored	O
with	O
ambient	O
music	O
.	O
</s>
<s>
However	O
,	O
the	O
score	O
as	O
a	O
whole	O
incorporates	O
more	O
electronic	O
elements	O
(	O
particularly	O
breakbeat	O
)	O
than	O
its	O
predecessor	B-Application
,	O
to	O
reflect	O
the	O
plot	O
's	O
thematic	O
thrust	O
of	O
a	O
machine-dominated	O
society	O
.	O
</s>
<s>
The	O
game	O
's	O
music	O
was	O
released	O
via	O
four	O
CDs	O
:	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Sons	O
of	O
Liberty	O
Original	O
Soundtrack	O
,	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Sons	O
of	O
Liberty	O
Soundtrack	O
2	O
:	O
The	O
Other	O
Side	O
,	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Substance	O
Limited	O
Sorter	O
(	O
Black	O
Edition	O
)	O
and	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Substance	O
Ultimate	O
Sorter	O
(	O
White	O
Edition	O
)	O
.	O
</s>
<s>
The	O
game	O
's	O
main	O
theme	O
was	O
chosen	O
by	O
the	O
London	O
Philharmonic	O
Orchestra	O
for	O
their	O
Greatest	O
Video	O
Game	O
Music	O
compilation	O
,	O
and	O
the	O
theme	O
is	O
a	O
key	O
regular	O
in	O
the	O
Video	O
Games	O
Live	O
concert	O
when	O
the	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
segment	O
is	O
introduced	O
.	O
</s>
<s>
A	O
segment	O
of	O
the	O
song	O
's	O
main	O
chorus	O
is	O
included	O
in	O
the	O
closing	O
sequence	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
3	I-Application
:	I-Application
Snake	I-Application
Eater	I-Application
.	O
</s>
<s>
In	O
contrast	O
to	O
the	O
original	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
Sons	O
of	O
Liberty	O
was	O
released	O
in	O
North	O
America	O
first	O
,	O
on	O
November	O
13	O
,	O
2001	O
.	O
</s>
<s>
A	O
questionnaire	O
was	O
also	O
added	O
in	O
the	O
Japanese	O
version	O
,	O
in	O
which	O
players	O
are	O
asked	O
about	O
their	O
experience	O
with	O
the	O
original	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
and	O
action	B-Application
games	I-Application
in	O
general	O
;	O
the	O
answers	O
to	O
the	O
questionnaire	O
determines	O
the	O
difficulty	O
level	O
of	O
the	O
game	O
and	O
whether	O
the	O
player	O
starts	O
the	O
game	O
on	O
the	O
Tanker	O
chapter	O
or	O
skips	O
directly	O
to	O
the	O
Plant	O
chapter	O
(	O
an	O
option	O
that	O
is	O
only	O
available	O
after	O
clearing	O
the	O
game	O
once	O
in	O
the	O
American	O
version	O
)	O
.	O
</s>
<s>
As	O
with	O
the	O
original	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
Sons	O
of	O
Liberty	O
was	O
sold	O
in	O
a	O
limited	O
"	O
Premium	O
Package	O
"	O
edition	O
in	O
addition	O
to	O
the	O
standard	O
release	O
,	O
which	O
was	O
packaged	O
in	O
a	O
black	O
box	O
containing	O
the	O
game	O
itself	O
with	O
a	O
reversible	O
cover	O
art	O
on	O
the	O
DVD	O
case	O
(	O
with	O
Snake	O
on	O
one	O
side	O
and	O
Raiden	O
on	O
the	O
other	O
)	O
,	O
a	O
video	O
DVD	O
known	O
as	O
the	O
Premium	O
Disc	O
,	O
which	O
features	O
a	O
collection	O
of	O
Metal	B-Application
Gear	I-Application
Solid-related	O
commercials	O
and	O
trailers	O
,	O
a	O
metallic	O
Solid	O
Snake	O
figurine	O
,	O
and	O
an	O
80-page	O
booklet	O
titled	O
Metal	B-Application
Gear	I-Application
Chronicle	O
featuring	O
artwork	O
and	O
commentary	O
about	O
the	O
series	O
.	O
</s>
<s>
The	O
European	O
version	O
came	O
packaged	O
with	O
a	O
video	O
DVD	O
titled	O
The	O
Making	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
.	O
</s>
<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Substance	O
,	O
the	O
expanded	O
edition	O
of	O
the	O
game	O
,	O
was	O
released	O
on	O
the	B-Application
original	I-Application
Xbox	I-Application
and	O
Windows	O
in	O
addition	O
to	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
The	O
Xbox	B-Application
version	O
was	O
initially	O
released	O
in	O
North	O
America	O
as	O
a	O
timed	O
exclusive	O
for	O
the	O
console	O
on	O
November	O
4	O
,	O
2002	O
.	O
</s>
<s>
This	O
was	O
followed	O
by	O
the	O
PlayStation	B-Device
2	I-Device
version	O
,	O
released	O
in	O
Japan	O
on	O
December	O
19	O
of	O
the	O
same	O
year	O
.	O
</s>
<s>
Substance	O
was	O
eventually	O
released	O
on	O
PlayStation	B-Device
2	I-Device
and	O
Windows	O
in	O
North	O
America	O
and	O
on	O
all	O
three	O
platforms	O
in	O
Europe	O
in	O
March	O
2003	O
.	O
</s>
<s>
Players	O
can	O
now	O
start	O
the	O
main	O
story	O
mode	O
at	O
the	O
Tanker	O
or	O
Plant	O
chapters	O
without	O
the	O
need	O
to	O
answer	O
a	O
questionnaire	O
first	O
,	O
and	O
a	O
new	O
set	O
of	O
collectible	O
dog	O
tags	O
have	O
been	O
added	O
(	O
exclusively	O
on	O
the	O
PlayStation	B-Device
2	I-Device
version	O
)	O
based	O
on	O
names	O
submitted	O
from	O
a	O
second	O
contest	O
in	O
addition	O
to	O
the	O
original	O
(	O
2001	O
)	O
set	O
.	O
</s>
<s>
The	O
visual	O
effect	O
for	O
the	O
thermal	B-Algorithm
goggles	I-Algorithm
was	O
also	O
changed	O
in	O
Substance	O
,	O
and	O
the	O
FHM-licensed	O
posters	O
that	O
adorned	O
several	O
locations	O
in	O
the	O
original	O
Sons	O
of	O
Liberty	O
version	O
have	O
been	O
replaced	O
with	O
public	O
domain	O
images	O
(	O
these	O
were	O
also	O
replaced	O
in	O
The	O
Document	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
)	O
.	O
</s>
<s>
The	O
Xbox	B-Application
and	O
Windows	O
versions	O
feature	O
slight	O
dialogue	O
changes	O
during	O
specific	O
control	O
explanations	O
in	O
which	O
the	O
term	O
"	O
analog	O
stick	O
"	O
was	O
substituted	O
with	O
"	O
thumbstick	O
"	O
(	O
Microsoft	O
's	O
preferred	O
term	O
)	O
.	O
</s>
<s>
The	O
controls	O
were	O
also	O
slightly	O
altered	O
for	O
the	O
Xbox	B-Application
version	O
,	O
due	O
to	O
its	O
fewer	O
shoulder	O
buttons	O
(	O
clicking	O
on	O
the	O
left	O
thumbstick	O
switches	O
between	O
normal	O
and	O
first-person	O
view	O
,	O
while	O
the	O
Y	O
button	O
serves	O
as	O
a	O
lock-on	O
for	O
the	O
player	O
's	O
aim	O
)	O
.	O
</s>
<s>
The	O
Xbox	B-Application
version	O
has	O
support	O
for	O
5.1	O
surround	O
sound	O
.	O
</s>
<s>
Exclusive	O
to	O
the	O
PlayStation	B-Device
2	I-Device
version	O
is	O
a	O
skateboarding	O
minigame	O
in	O
which	O
the	O
player	O
control	O
Snake	O
or	O
Raiden	O
in	O
a	O
pair	O
of	O
Big	O
Shell-themed	O
levels	O
.	O
</s>
<s>
The	O
minigame	O
uses	O
the	O
same	O
engine	O
from	O
Evolution	B-Device
Skateboarding	I-Device
,	O
which	O
was	O
developed	O
by	O
Konami	O
Computer	O
Entertainment	O
Osaka	O
.	O
</s>
<s>
On	O
release	O
,	O
Famitsu	O
magazine	O
scored	O
the	O
PlayStation	B-Device
2	I-Device
version	O
of	O
the	O
game	O
a	O
35	O
out	O
of	O
40	O
.	O
</s>
<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Sons	O
of	O
Liberty	O
-	O
HD	O
Edition	O
was	O
released	O
on	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
and	O
Xbox	B-Operating_System
360	I-Operating_System
in	O
2011	O
and	O
for	O
the	O
PlayStation	B-Device
Vita	I-Device
in	O
2012	O
.	O
</s>
<s>
This	O
version	O
is	O
included	O
in	O
the	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
HD	I-Application
Collection	I-Application
but	O
is	O
also	O
available	O
as	O
a	O
digital	O
download	O
on	O
the	O
PlayStation	B-Device
Network	I-Device
and	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
.	O
</s>
<s>
The	B-Operating_System
PS3	I-Operating_System
and	O
Xbox	B-Operating_System
360	I-Operating_System
versions	O
feature	O
an	O
increased	O
720p	O
resolution	O
and	O
a	O
16:9	O
aspect	O
ratio	O
,	O
providing	O
a	O
clearer	O
and	O
wider	O
view	O
of	O
the	O
player	O
's	O
surroundings	O
compared	O
to	O
the	O
original	O
480p	O
resolution	O
and	O
4:3	O
ratio	O
of	O
the	O
PlayStation	B-Device
2	I-Device
version	O
,	O
while	O
the	O
PS	B-Device
Vita	I-Device
version	O
runs	O
at	O
qHD	O
resolution	O
.	O
</s>
<s>
Most	O
of	O
the	O
additional	O
content	O
from	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Substance	O
has	O
also	O
been	O
ported	O
in	O
this	O
version	O
,	O
such	O
as	O
the	O
Missions	O
and	O
Snake	O
Tales	O
modes	O
,	O
although	O
the	O
Skateboarding	O
minigame	O
that	O
was	O
present	O
in	O
the	O
PlayStation	B-Device
2	I-Device
version	O
of	O
Substance	O
is	O
absent	O
.	O
</s>
<s>
The	B-Operating_System
PS3	I-Operating_System
and	O
Vita	O
versions	O
have	O
a	O
"	O
transfarring	O
"	O
option	O
that	O
allows	O
players	O
to	O
transfer	O
save	O
data	O
between	O
both	O
versions	O
through	O
a	O
Wi-Fi	O
connection	O
or	O
a	O
cloud	B-Architecture
network	I-Architecture
.	O
</s>
<s>
The	O
Vita	O
version	O
has	O
touchscreen	B-Device
and	O
touchpad	B-Application
support	O
for	O
certain	O
gameplay	O
functions	O
such	O
as	O
switching	O
between	O
items	O
and	O
weapons	O
or	O
zooming	O
into	O
cutscenes	O
.	O
</s>
<s>
The	O
Document	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
is	O
an	O
interactive	O
documentary	O
developed	O
by	O
Konami	O
Computer	O
Entertainment	O
Japan	O
and	O
published	O
by	O
Konami	O
,	O
originally	O
released	O
on	O
September	O
26	O
,	O
2002	O
.	O
</s>
<s>
The	O
game	O
covers	O
the	O
development	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
in	O
great	O
detail	O
,	O
containing	O
internal	O
material	O
developed	O
during	O
the	O
production	O
of	O
Sons	O
of	O
Liberty	O
.	O
</s>
<s>
Other	O
content	O
includes	O
storyboards	O
,	O
behind-the-scenes	O
footage	O
,	O
preview	O
trailers	O
,	O
music	O
tracks	O
(	O
with	O
the	O
option	O
to	O
play	O
alternate	O
patterns	O
when	O
applicable	O
)	O
,	O
the	O
finalized	O
screenplay	O
,	O
Hideo	O
Kojima	O
's	O
original	O
draft	O
(	O
available	O
in	O
Japanese	O
only	O
)	O
,	O
a	O
development	O
timeline	O
,	O
and	O
a	O
gallery	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
related	O
products	O
and	O
merchandise	O
.	O
</s>
<s>
The	O
disc	O
also	O
includes	O
a	O
few	O
VR	O
training	O
missions	O
that	O
were	O
later	O
featured	O
in	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Substance	O
.	O
</s>
<s>
In	O
Europe	O
,	O
the	O
disc	O
was	O
bundled	O
with	O
the	O
PlayStation	B-Device
2	I-Device
version	O
of	O
Substance	O
instead	O
of	O
having	O
a	O
stand-alone	O
release	O
.	O
</s>
<s>
It	O
was	O
also	O
included	O
in	O
the	O
Japanese	O
20th	O
Anniversary	O
re-release	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Sons	O
of	O
Liberty	O
in	O
July	O
2007	O
.	O
</s>
<s>
IDW	O
Publishing	O
published	O
a	O
12-issue	O
comic	O
book	O
adaptation	O
from	O
2006	O
to	O
2007	O
,	O
titled	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
:	O
Sons	O
of	O
Liberty	O
,	O
illustrated	O
by	O
Ashley	O
Wood	O
(	O
who	O
also	O
worked	O
on	O
the	O
comic	O
book	O
adaptation	O
of	O
the	O
previous	O
game	O
)	O
and	O
written	O
by	O
Alex	O
Garner	O
.	O
</s>
<s>
A	O
digital	O
version	O
of	O
the	O
comic	O
,	O
titled	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Bande	O
Dessinée	O
,	O
was	O
released	O
on	O
June	O
12	O
,	O
2008	O
,	O
in	O
Japan	O
.	O
</s>
<s>
Originally	O
announced	O
as	O
a	O
PlayStation	B-Operating_System
Portable	I-Operating_System
game	O
,	O
similar	O
to	O
the	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
:	O
Digital	O
Graphic	O
Novel	O
,	O
the	O
digital	O
comic	O
was	O
released	O
as	O
a	O
DVD	O
film	O
instead	O
.	O
</s>
<s>
A	O
fully	O
voiced	O
version	O
of	O
the	O
graphic	O
novel	O
adaptation	O
of	O
the	O
first	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
is	O
featured	O
as	O
well	O
.	O
</s>
<s>
A	O
majority	O
of	O
the	O
character	O
interaction	O
in	O
the	O
novel	O
is	O
taken	O
verbatim	O
from	O
the	O
Codec	B-Application
conversations	O
in	O
the	O
game	O
itself	O
.	O
</s>
<s>
A	O
second	O
novelization	O
by	O
Kenji	O
Yano	O
(	O
written	O
under	O
the	O
pen	O
name	O
Hitori	O
Nojima	O
)	O
,	O
titled	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
Substance	O
II	O
,	O
was	O
published	O
by	O
Kadokawa	O
Shoten	O
in	O
Japan	O
on	O
September	O
24	O
,	O
2015	O
.	O
</s>
<s>
As	O
a	O
result	O
of	O
promising	O
trailers	O
and	O
the	O
enormous	O
commercial	O
success	O
of	O
its	O
predecessor	B-Application
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
there	O
was	O
a	O
high	O
level	O
of	O
anticipation	O
in	O
the	O
gaming	O
community	O
surrounding	O
the	O
release	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
:	O
Sons	O
of	O
Liberty	O
.	O
</s>
<s>
The	O
game	O
's	O
E3	O
2000	O
demo	O
surprised	O
many	O
spectators	O
with	O
its	O
level	O
of	O
realism	O
and	O
played	O
a	O
vital	O
role	O
in	O
the	O
PlayStation	B-Device
2	I-Device
console	O
's	O
early	O
success	O
.	O
</s>
<s>
It	O
was	O
the	O
most	O
anticipated	O
game	O
for	O
the	O
PlayStation	B-Device
2	I-Device
in	O
2001	O
.	O
</s>
<s>
It	O
went	O
on	O
to	O
be	O
one	O
of	O
the	O
top	O
four	O
best-selling	B-Application
games	B-Application
of	I-Application
2001	I-Application
in	O
the	O
United	O
States	O
.	O
</s>
<s>
Next	O
Generation	O
ranked	O
it	O
as	O
the	O
16th	O
highest-selling	O
game	O
launched	O
for	O
the	O
PlayStation	B-Device
2	I-Device
,	O
Xbox	B-Application
or	O
GameCube	B-Application
between	O
January	O
2000	O
and	O
July	O
2006	O
in	O
the	O
country	O
.	O
</s>
<s>
The	O
PlayStation	B-Device
2	I-Device
version	O
received	O
a	O
"	O
Platinum	O
"	O
sales	O
award	O
from	O
the	O
Entertainment	O
and	O
Leisure	O
Software	O
Publishers	O
Association	O
(	O
ELSPA	O
)	O
,	O
indicating	O
sales	O
of	O
at	O
least	O
300,000	O
copies	O
in	O
the	O
United	O
Kingdom	O
.	O
</s>
<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
received	O
"	O
universal	O
acclaim	O
"	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
,	O
where	O
it	O
is	O
one	O
of	O
the	O
highest-rated	O
games	O
on	O
the	O
website	O
,	O
and	O
remains	O
the	O
highest-rated	O
exclusive	O
on	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
Game	O
Informer	O
gave	O
the	O
game	O
a	O
score	O
of	O
10/10	O
,	O
while	O
GameSpot	O
gave	O
the	O
game	O
a	O
9.6	O
rating	O
,	O
stating	O
,	O
"	O
It	O
boils	O
down	O
to	O
this	O
:	O
You	O
must	O
play	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2.	O
"	O
</s>
<s>
Critics	O
praised	O
the	O
title	O
's	O
stealth	O
gameplay	O
and	O
the	O
improvements	O
over	O
its	O
predecessor	B-Application
,	O
as	O
well	O
as	O
the	O
game	O
's	O
level	O
of	O
graphical	O
detail	O
,	O
particularly	O
in	O
the	O
use	O
of	O
in-game	O
graphics	O
to	O
render	O
plot-driving	O
cutscenes	O
.	O
</s>
<s>
However	O
,	O
some	O
critics	O
considered	O
the	O
plot	O
to	O
be	O
"	O
incomprehensible	O
"	O
and	O
overly	O
cumbersome	O
for	O
an	O
action	B-Application
game	I-Application
,	O
and	O
also	O
felt	O
that	O
the	O
lengthy	O
dialogue	O
sections	O
heavily	O
disrupted	O
the	O
gameplay	O
and	O
that	O
the	O
dialogue	O
itself	O
was	O
overly	O
disjointed	O
and	O
convoluted	O
.	O
</s>
<s>
The	O
surprise	O
introduction	O
of	O
Raiden	O
as	O
the	O
protagonist	O
for	O
the	O
majority	O
of	O
the	O
game	O
(	O
replacing	O
long-time	O
series	O
protagonist	O
Solid	O
Snake	O
)	O
was	O
also	O
controversial	O
with	O
fans	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
.	O
</s>
<s>
Blake	O
Fischer	O
reviewed	O
the	O
PlayStation	B-Device
2	I-Device
version	O
of	O
the	O
game	O
for	O
Next	O
Generation	O
,	O
rating	O
it	O
five	O
stars	O
out	O
of	O
five	O
,	O
and	O
stated	O
that	O
"	O
MGS2	O
is	O
everything	O
we	O
hoped	O
it	O
would	O
be	O
,	O
and	O
more	O
.	O
</s>
<s>
Great	O
action	O
,	O
an	O
enthralling	O
story	O
,	O
and	O
plenty	O
of	O
surprises	O
makes	O
this	O
the	O
PS2	B-Device
game	O
to	O
get	O
this	O
holiday	O
season.	O
"	O
</s>
<s>
GameSpot	O
named	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
the	O
fourth-best	O
console	B-Application
game	I-Application
of	O
2001	O
,	O
and	O
presented	O
the	O
game	O
with	O
its	O
annual	O
"	O
Best	O
Music	O
"	O
and	O
"	O
Biggest	O
Surprise	O
"	O
awards	O
among	O
console	B-Application
games	I-Application
.	O
</s>
<s>
It	O
was	O
nominated	O
in	O
the	O
publication	O
's	O
"	O
Best	O
PlayStation	B-Device
2	I-Device
Game	O
"	O
,	O
"	O
Best	O
Sound	O
"	O
,	O
"	O
Best	O
Story	O
"	O
,	O
"	O
Best	O
Graphics	O
,	O
Technical	O
"	O
,	O
"	O
Best	O
Graphics	O
,	O
Artistic	O
"	O
and	O
"	O
Best	O
In-Game	O
Water	O
"	O
award	O
categories	O
.	O
</s>
<s>
Substance	O
was	O
nominated	O
for	O
the	O
2002	O
"	O
Best	O
Music	O
on	O
Xbox	B-Application
"	O
and	O
"	O
Best	O
Story	O
on	O
Xbox	B-Application
"	O
awards	O
.	O
</s>
<s>
In	O
a	O
2006	O
viewer	O
poll	O
conducted	O
by	O
Japan	O
's	O
Famitsu	O
magazine	O
of	O
top	O
100	O
games	O
of	O
all	O
time	O
,	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
was	O
ranked	O
at	O
No	O
.	O
</s>
<s>
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
was	O
ranked	O
No	O
.	O
</s>
<s>
It	O
served	O
as	O
a	O
killer	O
app	O
showcasing	O
what	O
the	O
PlayStation	B-Device
2	I-Device
hardware	I-Device
was	O
capable	O
of	O
,	O
with	O
the	O
game	O
setting	O
"	O
a	O
new	O
standard	O
in	O
cinematic	O
presentation	O
"	O
and	O
attention	O
to	O
detail	O
,	O
and	O
demonstrating	O
"	O
huge	O
numbers	O
of	O
enemies	O
on	O
screen	O
with	O
bodies	O
that	O
remain	O
in	O
the	O
scene	O
,	O
the	O
interaction	O
of	O
light	O
and	O
shadow	O
,	O
physics	O
interactions	O
with	O
real	O
world	O
objects	O
,	O
multi-tiered	O
environments	O
and	O
advanced	O
enemy	O
AI.	O
"	O
</s>
<s>
The	O
early	O
anticipation	O
that	O
surrounded	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
since	O
its	O
E3	O
2000	O
demo	O
has	O
been	O
credited	O
as	O
a	O
critical	O
factor	O
in	O
the	O
PlayStation	B-Device
2	I-Device
's	O
best-selling	B-Application
success	O
and	O
dominance	O
during	O
the	O
sixth	B-Application
console	I-Application
generation	I-Application
,	O
as	O
well	O
as	O
the	O
demise	O
of	O
Sega	O
's	O
Dreamcast	B-Operating_System
.	O
</s>
<s>
According	O
to	O
John	O
Szczepaniak	O
,	O
"	O
MGS2	O
was	O
the	O
game	O
which	O
single-handedly	O
sold	O
Sony	O
's	O
new	O
PlayStation	B-Device
2	I-Device
to	O
the	O
masses.	O
"	O
</s>
<s>
13	O
,	O
concluding	O
that	O
every	O
"	O
videogame	O
story	O
that	O
subverts	O
a	O
player	O
's	O
expectations	O
owes	O
a	O
debt	O
to	O
the	O
ground	O
broken	O
by	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2.	O
"	O
</s>
<s>
The	O
artistic	O
influence	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
can	O
be	O
seen	O
in	O
later	O
video	O
games	O
such	O
as	O
Goichi	O
Suda	O
's	O
similarly	O
postmodern	O
game	O
Killer7	B-Application
,	O
the	O
similarly	O
metanarrative	O
game	O
Portal	B-Application
,	O
the	O
survival	O
horror	O
title	O
Eternal	B-Application
Darkness	I-Application
:	I-Application
Sanity	I-Application
's	I-Application
Requiem	I-Application
,	O
and	O
particularly	O
the	O
first-person	O
shooter	O
BioShock	B-Application
,	O
which	O
featured	O
a	O
similar	O
plot	O
twist	O
to	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
.	O
</s>
<s>
Several	O
game	O
mechanics	O
developed	O
in	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
,	O
such	O
as	O
the	O
cover	O
system	O
and	O
laser	O
sight	O
mechanic	O
,	O
have	O
since	O
become	O
staples	O
of	O
stealth	O
games	O
as	O
well	O
as	O
shooters	O
,	O
including	O
Kill	B-Device
Switch	I-Device
(	O
2003	O
)	O
,	O
Resident	B-Application
Evil	I-Application
4	I-Application
(	O
2005	O
)	O
and	O
Gears	B-Application
of	I-Application
War	I-Application
(	O
2006	O
)	O
.	O
</s>
<s>
The	O
reveal	O
of	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
also	O
led	O
to	O
the	O
development	O
of	O
Splinter	B-Application
Cell	I-Application
,	O
which	O
Ubisoft	O
originally	O
intended	O
to	O
be	O
"	O
a	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
killer.	O
"	O
</s>
<s>
According	O
to	O
Kojima	O
,	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
paid	O
more	O
"	O
attention	O
to	O
the	O
surroundings	O
"	O
in	O
real-time	O
and	O
later	O
"	O
games	O
like	O
Call	B-Application
of	I-Application
Duty	I-Application
have	O
followed	O
this	O
trend	O
of	O
making	O
your	O
surroundings	O
more	O
realistic.	O
"	O
</s>
<s>
Neil	O
Druckmann	O
cited	O
the	O
revelation	O
of	O
Raiden	O
in	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
as	O
an	O
inspiration	O
for	O
the	O
bold	O
surprise	O
in	O
The	B-Application
Last	I-Application
of	I-Application
Us	I-Application
Part	I-Application
II	I-Application
(	O
2020	O
)	O
.	O
</s>
<s>
In	O
a	O
20-year	O
retrospective	O
,	O
Christian	O
Smith	O
of	O
Collider	O
said	O
that	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
2	O
remains	O
a	O
"	O
controversial	O
masterpiece	O
"	O
that	O
played	O
a	O
pivotal	O
role	O
in	O
"	O
redefining	O
the	O
art	O
of	O
making	O
video	O
games	O
after	O
the	O
turn	O
of	O
the	O
millennium	O
"	O
.	O
</s>
