<s>
Counter-Strike	B-Application
(	O
CS	O
)	O
is	O
a	O
series	O
of	O
multiplayer	O
tactical	O
first-person	O
shooter	O
video	O
games	O
in	O
which	O
teams	O
of	O
terrorists	O
battle	O
to	O
perpetrate	O
an	O
act	O
of	O
terror	O
(	O
bombing	O
,	O
hostage-taking	O
,	O
assassination	O
)	O
while	O
counter-terrorists	O
try	O
to	O
prevent	O
it	O
(	O
bomb	O
defusal	O
,	O
hostage	O
rescue	O
,	O
escort	O
mission	O
)	O
.	O
</s>
<s>
The	O
series	O
began	O
on	O
Windows	B-Application
in	O
1999	O
with	O
the	O
release	O
of	O
the	O
first	O
game	O
,	O
Counter-Strike	B-Application
.	O
</s>
<s>
It	O
was	O
initially	O
released	O
as	O
a	O
modification	O
(	O
"	O
mod	O
"	O
)	O
for	O
Half-Life	B-Application
that	O
was	O
designed	O
by	O
Minh	O
"	O
Gooseman	O
"	O
Le	O
and	O
Jess	O
"	O
Cliffe	O
"	O
Cliffe	O
before	O
the	O
rights	O
to	O
the	O
mod	O
's	O
intellectual	O
property	O
were	O
acquired	O
by	O
Valve	O
,	O
the	O
developers	O
of	O
Half-Life	B-Application
,	O
who	O
then	O
turned	O
Counter-Strike	B-Application
into	O
a	O
retail	O
product	O
released	O
in	O
2000	O
.	O
</s>
<s>
The	O
original	O
Counter-Strike	B-Application
was	O
followed	O
by	O
Counter-Strike	B-Application
:	I-Application
Condition	I-Application
Zero	I-Application
,	O
developed	O
by	O
Turtle	O
Rock	O
Studios	O
and	O
released	O
in	O
March	O
2004	O
.	O
</s>
<s>
A	O
previous	O
version	O
of	O
Condition	B-Application
Zero	I-Application
that	O
was	O
developed	O
by	O
Ritual	O
Entertainment	O
was	O
released	O
alongside	O
it	O
as	O
Condition	B-Application
Zero	I-Application
:	O
Deleted	O
Scenes	O
.	O
</s>
<s>
Eight	O
months	O
later	O
,	O
Valve	O
released	O
Counter-Strike	B-Application
:	I-Application
Source	I-Application
,	O
a	O
remake	O
of	O
the	O
original	O
Counter-Strike	B-Application
and	O
the	O
first	O
in	O
the	O
series	O
to	O
run	O
on	O
Valve	O
's	O
newly	O
created	O
Source	B-Application
engine	I-Application
.	O
</s>
<s>
The	O
fourth	O
game	O
in	O
the	O
main	O
series	O
,	O
Counter-Strike	B-Application
:	I-Application
Global	I-Application
Offensive	I-Application
,	O
was	O
released	O
by	O
Valve	O
in	O
2012	O
for	O
Windows	B-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
Xbox	B-Operating_System
360	I-Operating_System
,	O
and	O
PlayStation	B-Operating_System
3	I-Operating_System
.	O
</s>
<s>
Hidden	O
Path	O
Entertainment	O
,	O
who	O
worked	O
on	O
Counter-Strike	B-Application
:	I-Application
Source	I-Application
post-release	O
,	O
helped	O
to	O
develop	O
the	O
game	O
alongside	O
Valve	O
.	O
</s>
<s>
Counter-Strike	B-Application
2	O
was	O
announced	O
in	O
March	O
2023	O
,	O
with	O
a	O
tentative	O
release	O
date	O
of	O
Summer	O
2023	O
.	O
</s>
<s>
These	O
include	O
the	O
Counter-Strike	B-Application
Online	I-Application
series	O
,	O
Counter-Strike	B-Application
Neo	O
,	O
and	O
Counter-Strike	B-Application
Nexon	O
:	O
Studio	O
.	O
</s>
<s>
Counter-Strike	B-Application
is	O
an	O
objective-based	O
,	O
multiplayer	O
tactical	O
first-person	O
shooter	O
.	O
</s>
<s>
Originally	O
a	O
modification	O
for	O
Half-Life	B-Application
,	O
the	O
rights	O
to	O
Counter-Strike	B-Application
,	O
as	O
well	O
as	O
the	O
developers	O
working	O
on	O
it	O
,	O
were	O
acquired	O
by	O
Valve	O
in	O
2000	O
.	O
</s>
<s>
The	O
game	O
received	O
a	O
port	O
to	O
Xbox	B-Application
in	O
2003	O
.	O
</s>
<s>
It	O
was	O
also	O
ported	O
to	O
OS	B-Operating_System
X	I-Operating_System
and	O
Linux	B-Application
in	O
the	O
form	O
of	O
a	O
beta	O
in	O
January	O
2013	O
.	O
</s>
<s>
Counter-Strike	B-Application
was	O
followed-up	O
with	O
Counter-Strike	B-Application
:	I-Application
Condition	I-Application
Zero	I-Application
,	O
developed	O
by	O
Turtle	O
Rock	O
Studios	O
and	O
released	O
in	O
2004	O
.	O
</s>
<s>
It	O
used	O
the	O
Half-Life	B-Application
GoldSrc	B-Application
engine	I-Application
,	O
similar	O
to	O
its	O
predecessor	O
.	O
</s>
<s>
The	O
game	O
received	O
mixed	O
reviews	O
in	O
contrast	O
to	O
its	O
predecessor	O
and	O
was	O
quickly	O
followed	O
with	O
a	O
further	O
entry	O
to	O
the	O
series	O
titled	O
Counter-Strike	B-Application
:	I-Application
Source	I-Application
.	O
</s>
<s>
Counter-Strike	B-Application
:	I-Application
Source	I-Application
was	O
the	O
first	O
publicly	O
released	O
game	O
by	O
Valve	O
to	O
run	O
on	O
the	O
Source	B-Application
engine	I-Application
.	O
</s>
<s>
Counter-Strike	B-Application
:	I-Application
Source	I-Application
was	O
initially	O
released	O
as	O
a	O
beta	O
to	O
members	O
of	O
the	O
Valve	O
Cyber	O
Café	O
Program	O
on	O
August	O
11	O
,	O
2004	O
.	O
</s>
<s>
On	O
August	O
18	O
,	O
2004	O
,	O
the	O
beta	O
was	O
released	O
to	O
owners	O
of	O
Counter-Strike	B-Application
:	I-Application
Condition	I-Application
Zero	I-Application
and	O
those	O
who	O
had	O
received	O
a	O
Half-Life	B-Application
2	I-Application
voucher	O
bundled	O
with	O
some	O
ATI	B-Device
Radeon	I-Device
video	B-Device
cards	I-Device
.	O
</s>
<s>
While	O
the	O
original	O
release	O
only	O
included	O
a	O
version	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
the	O
game	O
eventually	O
received	O
a	O
port	O
to	O
OS	B-Operating_System
X	I-Operating_System
on	O
June	O
23	O
,	O
2010	O
,	O
with	O
a	O
Linux	B-Application
port	O
afterwards	O
in	O
2013	O
.	O
</s>
<s>
Counter-Strike	B-Application
:	I-Application
Global	I-Application
Offensive	I-Application
was	O
the	O
fourth	O
release	O
in	O
the	O
main	O
,	O
Valve-developed	O
Counter-Strike	B-Application
series	I-Application
in	O
2012	O
.	O
</s>
<s>
Much	O
like	O
Counter-Strike	B-Application
:	I-Application
Source	I-Application
the	O
game	O
runs	O
on	O
the	O
Source	B-Application
engine	I-Application
.	O
</s>
<s>
It	O
is	O
available	O
on	O
Microsoft	B-Application
Windows	I-Application
,	O
OSX	B-Operating_System
,	O
and	O
Linux	B-Application
,	O
as	O
well	O
as	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
and	O
PlayStation	B-Operating_System
3	I-Operating_System
consoles	O
,	O
and	O
is	O
backwards	O
compatible	O
on	O
the	O
Xbox	B-Application
One	O
console	O
.	O
</s>
<s>
On	O
March	O
22	O
,	O
2023	O
,	O
Valve	O
announced	O
Counter-Strike	B-Application
2	O
,	O
which	O
utilizes	O
the	O
Source	B-Operating_System
2	I-Operating_System
game	O
engine	O
.	O
</s>
<s>
It	O
is	O
currently	O
slated	O
for	O
a	O
Summer	O
2023	O
release	O
date	O
as	O
a	O
free	O
upgrade	O
to	O
Global	B-Application
Offensive	I-Application
.	O
</s>
<s>
A	O
Japanese	O
arcade	O
adaptation	O
of	O
Counter-Strike	B-Application
,	O
the	O
original	O
Half-Life	B-Application
multiplayer	O
modification	O
.	O
</s>
<s>
It	O
is	O
published	O
by	O
Namco	O
and	O
runs	O
on	O
a	O
Linux	B-Application
system	O
.	O
</s>
<s>
The	O
game	O
involves	O
anime-designed	O
characters	O
in	O
a	O
futuristic	O
designed	O
version	O
of	O
Counter-Strike	B-Application
.	O
</s>
<s>
Counter-Strike	B-Application
Online	I-Application
is	O
a	O
free-to-play	O
spin-off	O
available	O
in	O
much	O
of	O
eastern	O
Asia	O
.	O
</s>
<s>
It	O
uses	O
a	O
micropayment	O
model	O
that	O
is	O
managed	O
by	O
a	O
custom	O
version	O
of	O
the	O
Steam	B-Application
back-end	O
.	O
</s>
<s>
Announced	O
in	O
2012	O
and	O
aimed	O
at	O
the	O
Asian	O
gaming	O
market	O
,	O
a	O
sequel	O
titled	O
Counter-Strike	B-Application
Online	I-Application
2	O
was	O
developed	O
by	O
Nexon	O
on	O
the	O
Source	B-Application
game	I-Application
engine	I-Application
and	O
released	O
in	O
2013	O
.	O
</s>
<s>
In	O
August	O
2014	O
,	O
Nexon	O
announced	O
Counter-Strike	B-Application
Nexon	O
:	O
Zombies	O
,	O
a	O
free-to-play	O
,	O
zombie-themed	O
spin-off	O
,	O
developed	O
on	O
the	O
GoldSrc	B-Application
game	O
engine	O
.	O
</s>
<s>
On	O
September	O
23	O
,	O
2014	O
,	O
an	O
open	O
beta	O
was	O
released	O
on	O
Steam	B-Application
.	O
</s>
<s>
On	O
October	O
30	O
,	O
2019	O
,	O
Counter-Strike	B-Application
Nexon	O
:	O
Zombies	O
was	O
renamed	O
to	O
Counter-Strike	B-Application
Nexon	O
:	O
Studio	O
.	O
</s>
<s>
Counter-Strike	B-Application
has	O
over	O
20	O
years	O
of	O
competitive	O
play	O
beginning	O
with	O
the	O
original	O
Counter-Strike	B-Application
.	O
</s>
<s>
Cyberathlete	O
Professional	O
League	O
,	O
along	O
with	O
World	O
Cyber	O
Games	O
and	O
Electronic	O
Sports	O
World	O
Cup	O
were	O
among	O
the	O
largest	O
tournaments	O
for	O
the	O
Counter-Strike	B-Application
series	I-Application
until	O
2007	O
.	O
</s>
<s>
Since	O
2013	O
,	O
Valve	O
have	O
sponsored	O
Counter-Strike	B-Application
:	I-Application
Global	I-Application
Offensive	I-Application
Major	O
Championships	O
with	O
large	O
prize	O
pools	O
and	O
have	O
become	O
the	O
most	O
prestigious	O
tournaments	O
in	O
CS:GO	B-Application
.	O
</s>
<s>
Counter-Strike	B-Application
is	O
considered	O
one	O
of	O
the	O
most	O
influential	O
first	O
person	O
shooters	O
in	O
history	O
.	O
</s>
<s>
,	O
the	O
Counter-Strike	B-Application
franchise	O
has	O
sold	O
over	O
25	O
million	O
units	O
.	O
</s>
