<s>
Tom	B-Application
Clancy	I-Application
's	I-Application
Rainbow	I-Application
Six	I-Application
Siege	I-Application
is	O
an	O
online	B-Application
tactical	O
shooter	O
video	O
game	O
developed	O
by	O
Ubisoft	O
Montreal	O
and	O
published	O
by	O
Ubisoft	O
.	O
</s>
<s>
It	O
was	O
released	O
worldwide	O
for	O
PlayStation	B-Operating_System
4	I-Operating_System
,	O
Windows	O
,	O
and	O
Xbox	B-Device
One	I-Device
on	O
December	O
1	O
,	O
2015	O
;	O
the	O
game	O
was	O
also	O
released	O
for	O
PlayStation	B-Device
5	I-Device
and	O
Xbox	B-Device
Series	I-Device
X/S	I-Device
exactly	O
five	O
years	O
later	O
on	O
December	O
1	O
,	O
2020	O
.	O
</s>
<s>
The	O
title	O
received	O
a	O
port	O
for	O
Google	B-Application
Stadia	I-Application
on	O
June	O
30	O
,	O
2021	O
,	O
and	O
one	O
for	O
Amazon	B-Operating_System
Luna	I-Operating_System
in	O
January	O
2022	O
.	O
</s>
<s>
Siege	O
is	O
an	O
entry	O
in	O
the	O
Rainbow	B-Application
Six	I-Application
series	O
and	O
the	O
successor	O
to	O
Tom	B-Device
Clancy	I-Device
's	I-Device
Rainbow	I-Device
6	I-Device
:	I-Device
Patriots	I-Device
,	O
a	O
tactical	O
shooter	O
that	O
had	O
a	O
larger	O
focus	O
on	O
narrative	O
.	O
</s>
<s>
The	O
team	O
evaluated	O
the	O
core	O
of	O
the	O
Rainbow	B-Application
Six	I-Application
franchise	O
and	O
believed	O
that	O
letting	O
players	O
impersonate	O
the	O
top	O
counter-terrorist	O
operatives	O
around	O
the	O
world	O
suited	O
the	O
game	O
most	O
.	O
</s>
<s>
Initial	O
sales	O
were	O
weak	O
,	O
but	O
the	O
game	O
's	O
player	O
base	O
increased	O
significantly	O
as	O
Ubisoft	O
adopted	O
a	O
"	O
games	O
as	O
a	O
service	O
"	O
model	O
for	O
the	O
game	O
and	O
subsequently	O
released	O
several	O
packages	O
of	O
free	O
downloadable	B-Protocol
content	I-Protocol
.	O
</s>
<s>
Rainbow	B-Application
Six	I-Application
Extraction	I-Application
,	O
a	O
spin-off	O
game	O
featuring	O
Siege	O
characters	O
,	O
was	O
released	O
in	O
January	O
2022	O
.	O
</s>
<s>
Tom	B-Application
Clancy	I-Application
's	I-Application
Rainbow	I-Application
Six	I-Application
Siege	I-Application
is	O
a	O
first-person	O
shooter	O
game	O
,	O
in	O
which	O
players	O
utilize	O
many	O
different	O
operators	O
from	O
the	O
Rainbow	O
team	O
.	O
</s>
<s>
The	O
base	O
Counter-Terrorism	O
Units	O
(	O
CTUs	O
)	O
available	O
for	O
play	O
are	O
the	O
American	O
Hostage	O
Rescue	O
Team	O
(	O
referred	O
to	O
in-game	O
as	O
the	O
FBI	O
SWAT	O
)	O
,	O
the	O
British	O
SAS	O
,	O
the	O
German	O
GSG-9	O
,	O
the	O
Russian	O
Spetsnaz	O
and	O
the	O
French	O
GIGN	O
,	O
each	O
of	O
which	O
has	O
four	O
operators	O
per	O
unit	O
split	O
between	O
attackers	O
and	O
defenders	O
(	O
other	O
units	O
were	O
later	O
added	O
through	O
downloadable	B-Protocol
content	I-Protocol
,	O
see	O
below	O
)	O
.	O
</s>
<s>
When	O
the	O
round	O
begins	O
in	O
an	O
online	B-Application
match	O
,	O
the	O
attackers	O
choose	O
one	O
of	O
several	O
spawn	O
points	O
from	O
which	O
to	O
launch	O
their	O
attack	O
while	O
defenders	O
do	O
the	O
same	O
from	O
which	O
to	O
defend	O
from	O
.	O
</s>
<s>
With	O
the	O
downloadable	B-Protocol
content	I-Protocol
(	O
DLC	B-Protocol
)	O
released	O
post-launch	O
with	O
an	O
additional	O
four	O
maps	O
from	O
year	O
one	O
and	O
three	O
maps	O
from	O
year	O
two	O
–	O
there	O
are	O
currently	O
20	O
playable	O
maps	O
.	O
</s>
<s>
Tactical	O
Realism	O
:	O
a	O
variation	O
of	O
the	O
standard	O
competitive	O
multiplayer	O
modes	O
,	O
added	O
with	O
the	O
release	O
of	O
the	O
Operation	O
Skull	O
Rain	O
DLC	B-Protocol
.	O
</s>
<s>
Players	O
take	O
on	O
the	O
role	O
of	O
either	O
attackers	O
or	O
defenders	O
,	O
and	O
must	O
fight	O
against	O
waves	O
of	O
enemies	O
controlled	O
by	O
artificial	B-Application
intelligence	I-Application
across	O
various	O
modes	O
like	O
Bomb	O
,	O
Hostage	O
,	O
or	O
Elimination	O
.	O
</s>
<s>
Outbreak	O
:	O
A	O
limited	O
time	O
event	O
exclusive	O
to	O
Operation	O
Chimera	O
,	O
Outbreak	O
pits	O
a	O
3	O
player	O
team	O
in	O
a	O
co-op	O
PVE	O
environment	O
against	O
an	O
extraterrestrial	O
biohazard	O
threat	O
,	O
namely	O
AI-controlled	O
heavily	O
mutated	O
forms	O
of	O
humans	O
infected	O
with	O
said	O
alien	O
parasite	O
.	O
</s>
<s>
The	O
game	O
's	O
predecessor	O
was	O
Tom	B-Device
Clancy	I-Device
's	I-Device
Rainbow	I-Device
6	I-Device
:	I-Device
Patriots	I-Device
,	O
a	O
tactical	O
shooter	O
announced	O
in	O
2011	O
.	O
</s>
<s>
In	O
addition	O
,	O
it	O
was	O
planned	O
to	O
be	O
released	O
on	O
seventh-generation	B-Application
video-game	I-Application
consoles	I-Application
which	O
were	O
not	O
capable	O
of	O
processing	O
certain	O
game	O
mechanics	O
.	O
</s>
<s>
They	O
evaluated	O
the	O
core	O
of	O
the	O
Rainbow	B-Application
Six	I-Application
series	O
,	O
which	O
they	O
thought	O
was	O
about	O
being	O
a	O
member	O
of	O
a	O
counter-terrorist	O
team	O
travelling	O
around	O
the	O
globe	O
to	O
deal	O
with	O
dangerous	O
terrorist	O
attacks	O
–	O
operations	O
which	O
are	O
usually	O
intense	O
confrontations	O
between	O
attackers	O
and	O
defenders	O
.	O
</s>
<s>
The	O
game	O
was	O
originally	O
called	O
Rainbow	B-Application
Six	I-Application
Unbreakable	O
,	O
a	O
title	O
that	O
reflected	O
not	O
only	O
the	O
game	O
's	O
destruction	O
mechanic	O
but	O
also	O
the	O
mindset	O
of	O
the	O
development	O
team	O
,	O
who	O
had	O
to	O
deliver	O
a	O
game	O
that	O
was	O
once	O
stuck	O
in	O
development	O
hell	O
.	O
</s>
<s>
The	O
150-person	O
team	O
consisted	O
mainly	O
of	O
first-person	O
shooter	O
veterans	O
or	O
longtime	O
Rainbow	B-Application
Six	I-Application
players	O
.	O
</s>
<s>
When	O
the	O
game	O
's	O
development	O
was	O
begun	O
,	O
the	O
developer	O
's	O
in-house	O
team	O
completed	O
their	O
work	O
on	O
RealBlast	B-Application
Destruction	I-Application
,	O
an	O
engine	O
that	O
"	O
procedurally	O
breaks	O
everything	O
down	O
"	O
and	O
remodels	O
the	O
environment	O
.	O
</s>
<s>
The	O
game	O
's	O
music	O
was	O
composed	O
by	O
Paul	O
Haslinger	O
,	O
who	O
had	O
worked	O
on	O
the	O
score	O
of	O
the	O
previous	O
Rainbow	B-Application
Six	I-Application
games	O
and	O
the	O
Far	B-Application
Cry	I-Application
series	O
.	O
</s>
<s>
Players	O
who	O
purchased	O
Siege	O
for	O
the	B-Device
Xbox	I-Device
One	I-Device
could	O
download	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Rainbow	I-Application
Six	I-Application
:	I-Application
Vegas	I-Application
and	O
its	O
sequel	O
,	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Rainbow	I-Application
Six	I-Application
:	I-Application
Vegas	I-Application
2	I-Application
for	O
free	O
.	O
</s>
<s>
Players	O
who	O
bought	O
this	O
version	O
of	O
the	O
game	O
could	O
gain	O
early	O
access	O
to	O
operators	O
offered	O
in	O
the	O
DLCs	B-Protocol
and	O
receive	O
several	O
weapon	O
skins	O
.	O
</s>
<s>
In	O
February	O
2017	O
,	O
the	O
Starter	O
Edition	O
became	O
permanently	O
available	O
via	O
Uplay	B-Operating_System
.	O
</s>
<s>
The	O
title	O
was	O
supported	O
with	O
many	O
updates	O
upon	O
launch	O
,	O
with	O
the	O
company	O
introducing	O
fixes	O
to	O
bugs	B-Error_Name
and	O
improvements	O
on	O
both	O
matchmaking	O
and	O
general	O
gameplay	O
mechanics	O
.	O
</s>
<s>
It	O
allows	O
players	O
to	O
submit	O
bug	B-Error_Name
reports	O
to	O
Ubisoft	O
,	O
which	O
would	O
fix	O
the	O
bug	B-Error_Name
and	O
award	O
the	O
player	O
in-game	O
items	O
.	O
</s>
<s>
They	O
also	O
introduced	O
an	O
auto-kick	O
system	O
,	O
which	O
automatically	O
removes	O
players	O
from	O
a	O
match	O
when	O
they	O
kill	O
friendly	O
players	O
and	O
launched	O
the	O
BattlEye	B-Application
system	O
in	O
August	O
2016	O
to	O
punish	O
cheaters	O
.	O
</s>
<s>
All	O
downloadable	B-Protocol
content	I-Protocol
maps	O
were	O
released	O
to	O
all	O
players	O
for	O
free	O
.	O
</s>
<s>
Downloadable	B-Protocol
content	I-Protocol
for	O
the	O
game	O
was	O
divided	O
into	O
several	O
seasons	O
,	O
with	O
a	O
Mid-Season	O
Reinforcement	O
patch	O
which	O
added	O
new	O
weapons	O
and	O
modified	O
some	O
of	O
the	O
operators	O
 '	O
core	O
abilities	O
.	O
</s>
<s>
The	O
team	O
focused	O
on	O
introducing	O
new	O
operators	O
to	O
provide	O
variety	O
for	O
esports	O
viewers	O
after	O
the	O
game	O
's	O
release	O
,	O
a	O
decision	O
inspired	O
by	O
modern	O
multiplayer	O
online	B-Application
battle	O
arena	O
games	O
such	O
as	O
Dota	B-Application
2	I-Application
,	O
as	O
this	O
type	O
of	O
game	O
often	O
has	O
80	O
–	O
100	O
playable	O
characters	O
.	O
</s>
<s>
ESL	O
and	O
Ubisoft	O
officially	O
announced	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Rainbow	I-Application
Six	I-Application
Pro	O
League	O
,	O
a	O
global	O
tournament	O
for	O
Windows	O
and	O
Xbox	B-Device
One	I-Device
players	O
.	O
</s>
<s>
A	O
European	O
team	O
,	O
PENTA	O
Sports	O
,	O
became	O
the	O
champion	O
of	O
the	O
first	O
season	O
of	O
Rainbow	B-Application
Six	I-Application
Pro	O
League	O
after	O
defeating	O
another	O
team	O
,	O
GiFu	O
,	O
at	O
the	O
final	O
of	O
the	O
tournament	O
held	O
in	O
May	O
2016	O
.	O
</s>
<s>
In	O
2017	O
,	O
it	O
was	O
revealed	O
that	O
Pro	O
League	O
Year	O
Two	O
would	O
return	O
,	O
but	O
Xbox	B-Device
One	I-Device
tournaments	O
would	O
not	O
be	O
featured	O
.	O
</s>
<s>
The	O
2018	O
tournament	O
attracted	O
321,000	O
viewers	O
on	O
Twitch	B-Application
.	O
</s>
<s>
Both	O
Nathan	O
Lawrence	O
from	O
Red	O
Bull	O
and	O
Richie	O
Shoemaker	O
from	O
Eurogamer	O
compared	O
the	O
game	O
favourably	O
with	O
Counter-Strike	B-Application
:	I-Application
Global	I-Application
Offensive	I-Application
,	O
with	O
both	O
being	O
hopeful	O
that	O
Siege	O
can	O
dethrone	O
Global	O
Offensive'''s	O
status	O
as	O
the	O
most	O
successful	O
competitive	O
esports	O
first-person	O
shooter	O
in	O
the	O
future	O
.	O
</s>
<s>
Rainbow	B-Application
Six	I-Application
Siege	I-Application
Year	O
3	O
Season	O
4	O
was	O
announced	O
on	O
November	O
18	O
at	O
the	O
Pro	O
League	O
Season	O
8	O
Finals	O
in	O
Rio	O
de	O
Janeiro	O
and	O
was	O
set	O
in	O
Morocco	O
.	O
</s>
<s>
The	O
Six	O
Invitational	O
2020	O
,	O
in	O
February	O
2020	O
,	O
had	O
the	O
highest	O
prize	O
pool	O
in	O
all	O
of	O
Rainbow	B-Application
Six	I-Application
with	O
$	O
3,000,000	O
split	O
among	O
16	O
teams	O
,	O
with	O
the	O
victors	O
,	O
Spacestation	O
Gaming	O
from	O
North	O
America	O
,	O
taking	O
home	O
the	O
lion	O
's	O
share	O
of	O
$	O
1,000,000	O
.	O
</s>
<s>
These	O
changes	O
to	O
the	O
competitive	O
scene	O
have	O
been	O
compared	O
to	O
that	O
of	O
Dota	B-Application
2	I-Application
and	O
League	B-Application
of	I-Application
Legends	I-Application
.	O
</s>
<s>
CrossoversRainbow	O
Six	O
Siege	O
operators	O
have	O
made	O
two	O
appearances	O
in	O
another	O
Clancy	O
series	O
,	O
Ghost	B-Application
Recon	I-Application
,	O
in	O
DLC	B-Protocol
missions	O
:	O
</s>
<s>
In	O
Operation	O
Archangel	O
,	O
a	O
summer	O
2018	O
DLC	B-Protocol
mission	O
for	O
Wildlands	B-Application
,	O
Valkyrie	O
and	O
Twitch	B-Application
travel	O
to	O
Bolivia	O
after	O
Caveira	O
has	O
gone	O
AWOL	O
and	O
is	O
suspected	O
of	O
killing	O
several	O
members	O
of	O
the	O
Santa	O
Blanca	O
Mexican	O
drug	O
cartel	O
,	O
which	O
the	O
Ghosts	O
are	O
working	O
to	O
bring	O
down	O
under	O
the	O
leadership	O
of	O
Nomad	O
and	O
their	O
CIA	O
contact	O
Karen	O
Bowman	O
.	O
</s>
<s>
In	O
2014	O
,	O
the	O
game	O
received	O
four	O
nominations	O
from	O
Game	O
Critics	O
Awards	O
:	O
Best	O
of	O
Show	O
,	O
Best	O
PC	O
Game	O
,	O
Best	O
Action	O
Game	O
and	O
Best	O
Online	B-Application
Multiplayer	O
Game	O
.	O
</s>
<s>
The	O
game	O
eventually	O
became	O
the	O
winner	O
of	O
the	O
Best	O
PC	O
Game	O
category.Tom	O
Clancy	O
's	O
Rainbow	O
Six	O
Siege	O
received	O
"	O
generally	O
favorable	O
"	O
reviews	O
from	O
critics	O
,	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
<s>
However	O
,	O
Bertz	O
criticized	O
its	O
lack	O
of	O
variety	O
,	O
weak	O
artificial	B-Application
intelligence	I-Application
,	O
and	O
its	O
less-intense	O
nature	O
when	O
compared	O
with	O
the	O
player-versus-player	O
modes	O
.	O
</s>
<s>
Following	O
the	O
summer	O
2016	O
launch	O
of	O
the	O
third	O
DLC	B-Protocol
,	O
Skull	O
Rain	O
,	O
the	O
size	O
of	O
the	O
player	O
base	O
had	O
a	O
40%	O
increase	O
,	O
and	O
the	O
title	O
had	O
more	O
than	O
10	O
million	O
registered	O
players	O
.	O
</s>
<s>
The	O
strong	O
performance	O
of	O
Siege	O
,	O
along	O
with	O
Tom	B-Application
Clancy	I-Application
's	I-Application
The	I-Application
Division	I-Application
(	O
2016	O
)	O
and	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Ghost	I-Application
Recon	I-Application
Wildlands	I-Application
(	O
2017	O
)	O
boosted	O
the	O
total	O
number	O
of	O
players	O
of	O
the	O
Tom	O
Clancy	O
's	O
franchise	O
to	O
44	O
million	O
in	O
2017	O
.	O
</s>
<s>
Critics	O
agreed	O
that	O
while	O
the	O
game	O
suffered	O
a	O
rocky	O
launch	O
,	O
Ubisoft	O
's	O
efforts	O
in	O
updating	O
the	O
game	O
and	O
fixing	O
bugs	B-Error_Name
have	O
increased	O
the	O
game	O
's	O
quality	O
and	O
had	O
transformed	O
the	O
game	O
into	O
a	O
better	O
experience	O
.	O
</s>
<s>
Several	O
years	O
after	O
the	O
game	O
's	O
launch	O
,	O
Siege	O
was	O
regarded	O
as	O
one	O
of	O
the	O
best	O
multiplayer	O
games	O
released	O
for	O
PlayStation	B-Operating_System
4	I-Operating_System
and	O
Xbox	B-Device
One	I-Device
by	O
some	O
critics	O
,	O
with	O
praise	O
being	O
directed	O
to	O
its	O
distinctiveness	O
and	O
the	O
similarities	O
it	O
shares	O
with	O
multiplayer	O
online	B-Application
battle	O
arena	O
games	O
and	O
hero	O
shooters	O
.	O
</s>
<s>
Unlike	O
titles	O
such	O
as	O
Star	B-Application
Wars	I-Application
Battlefront	I-Application
II	I-Application
(	O
2017	O
)	O
,	O
the	O
game	O
's	O
monetization	O
methods	O
and	O
the	O
use	O
of	O
loot	O
boxes	O
generated	O
minimal	O
amount	O
of	O
backlash	O
from	O
players	O
.	O
</s>
<s>
Future	O
Ubisoft	O
multiplayer-focused	O
titles	O
–	O
such	O
as	O
For	B-Application
Honor	I-Application
–	O
adopted	O
this	O
structure	O
,	O
in	O
which	O
the	O
company	O
would	O
provide	O
free	O
DLC	B-Protocol
and	O
updates	O
several	O
years	O
after	O
the	O
game	O
's	O
official	O
release	O
.	O
</s>
<s>
On	O
November	O
2	O
,	O
2018	O
,	O
Ubisoft	O
Montreal	O
announced	O
they	O
were	O
going	O
to	O
make	O
"	O
aesthetic	O
changes	O
"	O
to	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Rainbow	I-Application
Six	I-Application
Siege	I-Application
by	O
removing	O
references	O
to	O
death	O
,	O
sex	O
,	O
and	O
gambling	O
in	O
order	O
to	O
comply	O
with	O
regulations	O
of	O
Asian	O
countries	O
.	O
</s>
