<s>
Serious	B-Application
Sam	I-Application
:	I-Application
Siberian	I-Application
Mayhem	I-Application
is	O
a	O
2022	O
first-person	O
shooter	O
game	O
developed	O
by	O
Timelock	B-Application
Studio	I-Application
and	O
Croteam	O
,	O
and	O
published	O
by	O
Devolver	O
Digital	O
.	O
</s>
<s>
A	O
standalone	O
expansion	O
to	O
Serious	B-Application
Sam	I-Application
4	I-Application
,	O
the	O
game	O
was	O
released	O
on	O
25	O
January	O
2022	O
for	O
Windows	O
,	O
and	O
on	O
6	O
October	O
2022	O
for	O
PlayStation	B-Device
5	I-Device
and	O
Xbox	B-Device
Series	I-Device
X/S	I-Device
.	O
</s>
<s>
Serious	B-Application
Sam	I-Application
:	I-Application
Siberian	I-Application
Mayhem	I-Application
is	O
a	O
standalone	O
expansion	O
to	O
Serious	B-Application
Sam	I-Application
4	I-Application
.	O
</s>
<s>
Serious	B-Application
Sam	I-Application
:	I-Application
Siberian	I-Application
Mayhem	I-Application
takes	O
place	O
in	O
Russia	O
,	O
somewhere	O
in	O
deep	O
Siberia	B-Application
.	O
</s>
<s>
The	O
events	O
occur	O
in	O
an	O
alternate	O
timeline	O
of	O
Serious	B-Application
Sam	I-Application
4	I-Application
,	O
between	O
two	O
of	O
the	O
last	O
levels	O
from	O
the	O
main	O
game	O
.	O
</s>
<s>
Set	O
directly	O
after	O
the	O
events	O
of	O
"	O
The	O
Package	O
"	O
mission	O
in	O
Serious	B-Application
Sam	I-Application
4	I-Application
,	O
Sam	O
"	O
Serious	O
"	O
Stone	O
arrives	O
on	O
the	O
north	O
coast	O
of	O
Russia	O
,	O
aiming	O
to	O
reach	O
Tunguska	O
to	O
stop	O
General	O
Brand	O
,	O
who	O
took	O
possession	O
of	O
the	O
Holy	O
Grail	O
and	O
destroy	O
the	O
portal	O
being	O
used	O
by	O
mentals	O
forces	O
to	O
invade	O
the	O
Earth	O
.	O
</s>
<s>
Sam	O
infiltrates	O
an	O
oil	O
refinery	O
that	O
has	O
a	O
signal	O
SOS	B-Operating_System
on	O
a	O
transmission	O
tower	O
.	O
</s>
<s>
Ledov	O
offers	O
Sam	O
help	O
and	O
asks	O
the	O
hero	O
to	O
go	O
to	O
the	O
village	O
Kalinovka	O
in	O
southern	O
Siberia	B-Application
,	O
where	O
the	O
squad	O
will	O
be	O
waiting	O
for	O
him	O
.	O
</s>
<s>
Serious	B-Device
Sam	I-Device
continues	O
his	O
journey	O
south	O
through	O
Siberia	B-Application
's	O
tundra	O
and	O
soon	O
reaches	O
Kalinovka	O
.	O
</s>
<s>
One-Eye	O
Olga	O
also	O
walks	O
out	O
of	O
the	O
portal	O
and	O
reports	O
that	O
she	O
has	O
killed	O
Napoleon	B-Device
,	O
but	O
this	O
did	O
not	O
affect	O
the	O
future	O
in	O
any	O
way	O
.	O
</s>
<s>
Serious	B-Application
Sam	I-Application
:	I-Application
Siberian	I-Application
Mayhem	I-Application
was	O
developed	O
by	O
Timelock	B-Application
Studio	I-Application
,	O
a	O
Russian	O
group	O
composed	O
of	O
long-time	O
members	O
of	O
the	O
Serious	B-Device
Sam	I-Device
modding	O
community	O
,	O
under	O
the	O
oversight	O
of	O
Croteam	O
,	O
the	O
series	O
 '	O
creators	O
.	O
</s>
<s>
The	O
Timelock	B-Application
Studio	I-Application
members	O
had	O
previously	O
not	O
been	O
affiliated	O
with	O
each	O
other	O
but	O
by	O
chance	O
worked	O
together	O
as	O
testers	O
for	O
Serious	B-Application
Sam	I-Application
4	I-Application
.	O
</s>
<s>
With	O
initiative	O
from	O
their	O
team	O
lead	O
Evgeny	O
,	O
they	O
compiled	O
an	O
80-page	O
design	O
document	O
that	O
they	O
submitted	O
to	O
Croteam	O
in	O
September	O
2020	O
,	O
just	O
before	O
Serious	B-Application
Sam	I-Application
4s	I-Application
release	O
.	O
</s>
<s>
The	O
company	O
greenlit	O
the	O
project	O
as	O
a	O
three-level	O
piece	O
of	O
downloadable	B-Protocol
content	I-Protocol
(	O
DLC	B-Protocol
)	O
for	O
Serious	B-Application
Sam	I-Application
4	I-Application
,	O
though	O
it	O
later	O
expanded	O
to	O
a	O
standalone	O
expansion	O
as	O
it	O
outgrew	O
the	O
usual	O
scope	O
for	O
DLC	B-Protocol
.	O
</s>
<s>
After	O
settling	O
on	O
the	O
name	O
Serious	B-Application
Sam	I-Application
:	I-Application
Siberian	I-Application
Mayhem	I-Application
for	O
the	O
game	O
,	O
the	O
group	O
of	O
modders	O
founded	O
Timelock	B-Application
Studio	I-Application
in	O
2021	O
.	O
</s>
<s>
In	O
the	O
design	O
process	O
,	O
the	O
developers	O
sought	O
to	O
combine	O
classic	O
Serious	B-Device
Sam	I-Device
elements	O
with	O
modern	O
ones	O
to	O
make	O
up	O
for	O
faults	O
they	O
found	O
in	O
Serious	B-Application
Sam	I-Application
4	I-Application
.	O
</s>
<s>
Croteam	O
consulted	O
Timelock	B-Application
Studio	I-Application
on	O
creative	O
and	O
technical	O
aspects	O
,	O
including	O
optimisation	O
,	O
while	O
Devolver	O
Digital	O
acted	O
as	O
the	O
game	O
's	O
publisher	O
.	O
</s>
<s>
The	O
game	O
was	O
first	O
teased	O
via	O
a	O
34-second	O
video	O
published	O
to	O
YouTube	B-General_Concept
in	O
December	O
2021	O
,	O
showing	O
protagonist	O
Sam	O
Stone	O
navigating	O
a	O
frozen	O
landscape	O
.	O
</s>
<s>
Devolver	O
Digital	O
referenced	O
the	O
video	O
again	O
in	O
early	O
January	O
2022	O
,	O
stating	O
that	O
it	O
would	O
announce	O
a	O
new	O
Serious	B-Device
Sam	I-Device
entry	O
later	O
that	O
week	O
and	O
release	O
it	O
later	O
that	O
month	O
.	O
</s>
<s>
The	O
company	O
announced	O
Siberian	O
Mayhem	O
on	O
10	O
January	O
2022	O
and	O
released	O
it	O
on	O
25	O
January	O
for	O
Windows	O
via	O
Steam	B-Application
and	O
GOG.com	O
.	O
</s>
<s>
Owners	O
of	O
Serious	B-Application
Sam	I-Application
4	I-Application
received	O
a	O
25%	O
discount	O
on	O
the	O
new	O
game	O
.	O
</s>
<s>
Serious	B-Application
Sam	I-Application
:	I-Application
Siberian	I-Application
Mayhem	I-Application
received	O
"	O
mixed	O
or	O
average	O
"	O
reviews	O
,	O
according	O
to	O
the	O
review	B-Application
aggregator	I-Application
website	O
Metacritic	O
,	O
which	O
calculated	O
a	O
weighted	O
average	O
rating	O
of	O
70/100	O
based	O
on	O
twenty-five	O
critic	O
reviews	O
.	O
</s>
