<s>
Metro	B-Application
2033	I-Application
is	O
a	O
2010	O
first-person	O
shooter	O
survival	O
horror	O
video	O
game	O
developed	O
by	O
4A	O
Games	O
and	O
published	O
by	O
THQ	O
.	O
</s>
<s>
The	O
story	O
is	O
based	O
on	O
Dmitry	O
Glukhovsky	O
's	O
novel	O
of	O
the	O
same	O
name	O
,	O
where	O
survivors	O
of	O
a	O
nuclear	B-Application
war	I-Application
have	O
taken	O
refuge	O
in	O
the	O
Metro	O
tunnels	O
of	O
Moscow	O
.	O
</s>
<s>
Players	O
must	O
also	O
wear	O
a	O
gas	O
mask	O
to	O
explore	O
areas	O
covered	O
in	O
fallout	B-Application
radiation	O
,	O
both	O
underground	O
and	O
on	O
the	O
surface	O
.	O
</s>
<s>
Metro	B-Application
2033	I-Application
was	O
the	O
debut	O
title	O
for	O
4A	O
Games	O
,	O
whose	O
founders	O
had	O
experience	O
working	O
on	O
S.T.A.L.K.E.R.	O
</s>
<s>
:	O
Shadow	B-Application
of	I-Application
Chernobyl	I-Application
at	O
GSC	O
Game	O
World	O
.	O
</s>
<s>
The	O
game	O
was	O
powered	O
by	O
the	O
studio	O
's	O
own	O
proprietary	O
4A	B-Application
Engine	I-Application
.	O
</s>
<s>
It	O
was	O
first	O
announced	O
in	O
2006	O
as	O
Metro	B-Application
2033	I-Application
:	I-Application
The	I-Application
Last	I-Application
Refuge	I-Application
.	O
</s>
<s>
The	O
game	O
was	O
released	O
in	O
March	O
2010	O
for	O
Microsoft	B-Application
Windows	I-Application
and	O
Xbox	B-Operating_System
360	I-Operating_System
.	O
</s>
<s>
However	O
,	O
the	O
game	O
was	O
also	O
criticized	O
for	O
its	O
bugs	O
and	O
artificial	B-Application
intelligence	I-Application
.	I-Application
</s>
<s>
Metro	B-Application
2033	I-Application
was	O
profitable	O
for	O
THQ	O
,	O
selling	O
more	O
than	O
1.5	O
million	O
copies	O
by	O
June	O
2012	O
,	O
though	O
the	O
publisher	O
felt	O
that	O
their	O
marketing	O
efforts	O
were	O
rushed	O
.	O
</s>
<s>
The	O
sequel	O
Metro	B-Application
:	I-Application
Last	I-Application
Light	I-Application
was	O
released	O
in	O
2013	O
,	O
with	O
Deep	O
Silver	O
acquiring	O
the	O
publishing	O
rights	O
from	O
THQ	O
after	O
their	O
bankruptcy	O
.	O
</s>
<s>
A	O
compilation	O
of	O
both	O
titles	O
was	O
released	O
in	O
2014	O
as	O
Metro	B-Application
Redux	I-Application
for	O
Microsoft	B-Application
Windows	I-Application
,	O
PlayStation	B-Operating_System
4	I-Operating_System
and	O
Xbox	B-Device
One	I-Device
.	O
</s>
<s>
A	O
third	O
instalment	O
,	O
Metro	B-Application
Exodus	I-Application
,	O
was	O
released	O
in	O
2019	O
.	O
</s>
<s>
Metro	B-Application
2033	I-Application
is	O
a	O
first-person	O
shooter	O
video	O
game	O
.	O
</s>
<s>
The	O
game	O
features	O
a	O
minimalistic	O
heads-up	B-Application
display	I-Application
(	O
HUD	B-Application
)	O
.	O
</s>
<s>
Metro	B-Application
2033	I-Application
takes	O
place	O
in	O
the	O
city	O
of	O
Moscow	O
,	O
Russia	O
20	O
years	O
after	O
a	O
global	O
nuclear	O
holocaust	O
in	O
2013	O
.	O
</s>
<s>
In	O
2013	O
,	O
nuclear	B-Application
war	I-Application
devastated	O
the	O
Earth	O
,	O
wiping	O
out	O
billions	O
of	O
lives	O
.	O
</s>
<s>
Metro	B-Application
2033	I-Application
was	O
developed	O
by	O
Ukrainian	O
studio	O
4A	O
Games	O
,	O
founded	O
around	O
2005	O
.	O
</s>
<s>
:	O
Shadow	B-Application
of	I-Application
Chernobyl	I-Application
.	O
</s>
<s>
Glukhovsky	O
was	O
inspired	O
by	O
the	O
books	O
of	O
Roger	O
Zelazny	O
and	O
Ray	O
Bradbury	O
,	O
as	O
well	O
as	O
the	O
first	O
Fallout	B-Application
game	I-Application
.	O
</s>
<s>
According	O
to	O
Glukhovsky	O
,	O
the	O
main	O
theme	O
of	O
Metro	B-Application
2033	I-Application
is	O
xenophobia	O
,	O
particularly	O
the	O
human	O
reaction	O
to	O
the	O
mysterious	O
Dark	O
Ones	O
.	O
</s>
<s>
The	O
game	O
utilizes	O
4A	B-Application
Engine	I-Application
,	O
a	O
proprietary	O
game	O
engine	O
developed	O
by	O
4A	O
Games	O
.	O
</s>
<s>
First	O
,	O
the	O
GSC	O
engine	O
did	O
not	O
work	O
on	O
home	O
consoles	O
,	O
whereas	O
the	O
4A	B-Application
Engine	I-Application
was	O
designed	O
with	O
this	O
in	O
mind	O
.	O
</s>
<s>
Shishkovtsov	O
also	O
described	O
how	O
the	O
4A	B-Application
Engine	I-Application
began	O
as	O
a	O
pet	O
project	O
due	O
to	O
his	O
frustrations	O
with	O
the	O
X-Ray	O
engine	O
,	O
before	O
expanding	O
his	O
project	O
with	O
the	O
4A	O
Games	O
team	O
.	O
</s>
<s>
The	O
studio	O
's	O
goal	O
was	O
to	O
focus	O
on	O
atmosphere	O
and	O
story	O
,	O
having	O
been	O
largely	O
inspired	O
by	O
Half-Life	B-Application
2	I-Application
.	O
</s>
<s>
They	O
hoped	O
that	O
their	O
narrative	O
focus	O
would	O
help	O
the	O
game	O
stand	O
out	O
from	O
other	O
post-apocalyptic	O
titles	O
like	O
S.T.A.L.K.E.R	O
and	O
Fallout	B-Application
.	O
</s>
<s>
The	O
team	O
decided	O
to	O
keep	O
the	O
HUD	B-Application
minimalistic	O
,	O
to	O
keep	O
the	O
player	O
immersed	O
in	O
the	O
game	O
world	O
with	O
fewer	O
distractions	O
.	O
</s>
<s>
In	O
August	O
2006	O
,	O
4A	O
Games	O
first	O
announced	O
the	O
game	O
as	O
Metro	B-Application
2033	I-Application
:	I-Application
The	I-Application
Last	I-Application
Refuge	I-Application
,	O
for	O
both	O
PC	O
and	O
PlayStation	B-Operating_System
3	I-Operating_System
.	O
</s>
<s>
:	O
Shadow	B-Application
of	I-Application
Chernobyl	I-Application
.	O
</s>
<s>
THQ	O
officially	O
announced	O
the	O
partnership	O
in	O
October	O
2009	O
,	O
revealing	O
the	O
now-renamed	O
game	O
Metro	B-Application
2033	I-Application
for	O
both	O
PC	O
and	O
Xbox	B-Operating_System
360	I-Operating_System
.	O
</s>
<s>
The	O
decision	O
to	O
skip	O
PlayStation	B-Operating_System
3	I-Operating_System
was	O
a	O
business	O
decision	O
for	O
THQ	O
,	O
and	O
not	O
a	O
technical	O
limitation	O
.	O
</s>
<s>
Metro	B-Application
2033	I-Application
was	O
marketed	O
on	O
Steam	B-Application
by	O
offering	O
Red	B-Application
Faction	I-Application
:	I-Application
Guerrilla	I-Application
with	O
pre-orders	O
.	O
</s>
<s>
Immediately	O
after	O
the	O
game	O
's	O
release	O
,	O
the	O
studio	O
announced	O
that	O
it	O
had	O
begun	O
developing	O
downloadable	B-Protocol
content	I-Protocol
for	O
Metro	B-Application
2033	I-Application
.	O
</s>
<s>
The	O
content	O
was	O
later	O
revealed	O
to	O
as	O
the	O
"	O
Ranger	O
pack	O
"	O
,	O
which	O
added	O
two	O
new	O
weapons	O
,	O
as	O
well	O
as	O
a	O
Ranger	O
mode	O
that	O
removed	O
the	O
HUD	B-Application
,	O
and	O
reduced	O
the	O
ammunition	O
supply	O
while	O
boosting	O
damage	O
.	O
</s>
<s>
On	O
22	O
May	O
2014	O
,	O
a	O
Redux	O
version	O
of	O
the	O
game	O
was	O
announced	O
,	O
featuring	O
updates	O
to	O
the	O
4A	B-Application
Engine	I-Application
from	O
the	O
development	O
of	O
the	O
sequel	O
,	O
Metro	B-Application
:	I-Application
Last	I-Application
Light	I-Application
.	O
</s>
<s>
This	O
also	O
allowed	O
gameplay	O
changes	O
from	O
Last	O
Light	O
,	O
including	O
improved	O
controls	O
,	O
combat	O
,	O
stealth	O
mechanics	O
,	O
and	O
artificial	B-Application
intelligence	I-Application
.	I-Application
</s>
<s>
The	O
Redux	O
version	O
was	O
released	O
on	O
26	O
August	O
2014	O
in	O
North	O
America	O
,	O
and	O
29	O
August	O
2014	O
in	O
Europe	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
PlayStation	B-Operating_System
4	I-Operating_System
,	O
and	O
Xbox	B-Device
One	I-Device
.	O
</s>
<s>
The	O
re-release	O
also	O
led	O
to	O
a	O
compilation	O
package	O
with	O
both	O
2033	O
and	O
Last	O
Light	O
,	O
under	O
the	O
cumulative	O
title	O
of	O
Metro	B-Application
Redux	I-Application
.	O
</s>
<s>
A	O
demo	O
of	O
the	O
Redux	O
version	O
,	O
which	O
allows	O
players	O
to	O
play	O
through	O
the	O
first	O
one-third	O
of	O
the	O
game	O
,	O
was	O
released	O
for	O
PlayStation	B-Operating_System
4	I-Operating_System
and	O
Xbox	B-Device
One	I-Device
on	O
2	O
June	O
2015	O
.	O
</s>
<s>
Metro	B-Application
Redux	I-Application
was	O
later	O
released	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
on	O
28	O
February	O
2020	O
.	O
</s>
<s>
Metro	B-Application
2033	I-Application
received	O
favorable	O
reviews	O
from	O
critics	O
upon	O
release	O
,	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
<s>
Most	O
critics	O
agreed	O
that	O
the	O
game	O
was	O
a	O
compelling	O
and	O
engrossing	O
experience	O
undermined	O
by	O
inadequate	O
gameplay	O
systems	O
and	O
poor	O
artificial	B-Application
intelligence	I-Application
.	I-Application
</s>
<s>
Matthew	O
Pellett	O
from	O
GamesRadar	O
described	O
the	O
setting	O
as	O
"	O
evocative	O
"	O
,	O
and	O
compared	O
the	O
game	O
favourably	O
to	O
BioShock	B-Application
and	O
Half-Life	B-Application
2	I-Application
.	O
</s>
<s>
Kim	O
also	O
praised	O
the	O
4A	B-Application
Engine	I-Application
for	O
"	O
bringing	O
this	O
desolate	O
and	O
sad	O
world	O
to	O
life	O
"	O
,	O
and	O
applauded	O
the	O
developers	O
 '	O
effort	O
to	O
interweave	O
gameplay	O
with	O
the	O
narrative	O
.	O
</s>
<s>
Reviewers	O
also	O
criticized	O
the	O
game	O
's	O
artificial	B-Application
intelligence	I-Application
,	O
as	O
well	O
as	O
the	O
game	O
's	O
lack	O
of	O
replay	O
value	O
.	O
</s>
<s>
Metro	B-Application
2033	I-Application
was	O
the	O
fifth	O
best-selling	O
retail	O
game	O
in	O
the	O
UK	O
in	O
its	O
week	O
of	O
release	O
,	O
beaten	O
by	O
fellow	O
new	O
release	O
God	B-Application
of	I-Application
War	I-Application
III	I-Application
and	O
titles	O
including	O
Battlefield	B-Application
:	I-Application
Bad	I-Application
Company	I-Application
2	I-Application
,	O
Final	B-Application
Fantasy	I-Application
XIII	I-Application
and	O
Just	B-Application
Dance	I-Application
.	O
</s>
<s>
CEO	O
for	O
THQ	O
,	O
Brain	O
Farrell	O
,	O
added	O
that	O
due	O
to	O
the	O
low	O
cost	O
of	O
development	O
in	O
Eastern	O
Europe	O
,	O
modest	O
level	O
of	O
sales	O
would	O
already	O
guarantee	O
Metro	B-Application
2033	I-Application
as	O
a	O
commercial	O
success	O
.	O
</s>
<s>
While	O
the	O
exact	O
sales	O
of	O
the	O
game	O
have	O
not	O
been	O
revealed	O
,	O
Deep	O
Silver	O
announced	O
that	O
the	O
Metro	B-Application
Redux	I-Application
collection	O
sold	O
more	O
than	O
1.5	O
million	O
copies	O
in	O
April	O
2015	O
.	O
</s>
<s>
The	O
sequel	O
Metro	B-Application
:	I-Application
Last	I-Application
Light	I-Application
was	O
released	O
in	O
2013	O
.	O
</s>
<s>
The	O
story	O
continues	O
the	O
events	O
from	O
the	O
original	O
game	O
,	O
and	O
does	O
not	O
follow	O
any	O
direct	O
storylines	O
from	O
the	O
book	O
Metro	B-Application
2034	I-Application
.	O
</s>
<s>
A	O
third	O
instalment	O
,	O
Metro	B-Application
Exodus	I-Application
,	O
was	O
released	O
in	O
2019	O
.	O
</s>
