<s>
Serious	B-Application
Sam	I-Application
4	I-Application
is	O
a	O
2020	O
first-person	O
shooter	O
developed	O
by	O
Croatian	O
studio	O
Croteam	O
and	O
published	O
by	O
Devolver	O
Digital	O
.	O
</s>
<s>
It	O
is	O
part	O
of	O
the	O
Serious	B-Device
Sam	I-Device
series	O
and	O
a	O
prequel	O
to	O
Serious	B-Application
Sam	I-Application
3	I-Application
:	I-Application
BFE	I-Application
.	O
</s>
<s>
The	O
game	O
was	O
announced	O
in	O
April	O
2018	O
,	O
originally	O
as	O
Serious	B-Application
Sam	I-Application
4	I-Application
:	I-Application
Planet	I-Application
Badass	I-Application
,	O
was	O
released	O
in	O
September	O
2020	O
for	O
Microsoft	B-Application
Windows	I-Application
and	O
Stadia	B-Application
,	O
followed	O
by	O
PlayStation	B-Device
5	I-Device
and	O
Xbox	B-Device
Series	I-Device
X/S	I-Device
ports	O
in	O
December	O
2021	O
.	O
</s>
<s>
A	O
standalone	O
expansion	O
,	O
Serious	B-Application
Sam	I-Application
:	I-Application
Siberian	I-Application
Mayhem	I-Application
,	O
was	O
released	O
in	O
January	O
2022	O
.	O
</s>
<s>
As	O
in	O
other	O
entries	O
in	O
the	O
series	O
,	O
Serious	B-Application
Sam	I-Application
4	I-Application
involves	O
fighting	O
against	O
massive	O
hordes	O
of	O
enemies	O
in	O
large	O
areas	O
.	O
</s>
<s>
Reloading	O
returns	O
from	O
Serious	B-Application
Sam	I-Application
3	I-Application
:	I-Application
BFE	I-Application
,	O
but	O
the	O
weapons	O
have	O
been	O
adjusted	O
,	O
making	O
this	O
less	O
of	O
a	O
necessity	O
.	O
</s>
<s>
Many	O
new	O
additions	O
are	O
present	O
in	O
Serious	B-Application
Sam	I-Application
4	I-Application
,	O
mainly	O
a	O
skill	O
tree	O
,	O
side	O
quests	O
and	O
gadgets	O
.	O
</s>
<s>
An	O
unknown	O
amount	O
of	O
time	O
before	O
the	O
events	O
of	O
Serious	B-Application
Sam	I-Application
3	I-Application
:	I-Application
BFE	I-Application
,	O
a	O
massive	O
portal	O
opens	O
in	O
Tunguska	O
,	O
Russia	O
which	O
serves	O
as	O
a	O
bridgehead	O
for	O
Mental	O
's	O
forces	O
to	O
invade	O
Earth	O
.	O
</s>
<s>
As	O
the	O
whole	O
planet	O
scrambles	O
to	O
repel	O
the	O
alien	O
invasion	O
,	O
a	O
unit	O
from	O
the	O
Earth	O
Defense	O
Force	O
led	O
by	O
"	O
Serious	O
"	O
Sam	O
Stone	O
is	O
sent	O
by	O
General	O
Brand	O
to	O
Rome	O
to	O
meet	O
Father	O
Mikhail	O
,	O
a	O
priest	O
who	O
claims	O
to	O
have	O
found	O
some	O
clues	O
leading	O
to	O
the	O
Holy	B-General_Concept
Grail	I-General_Concept
,	O
which	O
,	O
according	O
to	O
him	O
,	O
is	O
a	O
powerful	O
alien	O
artefact	O
hidden	O
inside	O
the	O
Ark	O
of	O
the	O
Covenant	O
that	O
may	O
aid	O
them	O
against	O
the	O
invasion	O
.	O
</s>
<s>
There	O
,	O
Sam	O
retrieves	O
a	O
book	O
that	O
reveals	O
that	O
the	O
Grail	O
is	O
located	O
in	O
an	O
abandoned	O
church	O
in	O
Carcassonne	B-Application
,	O
France	O
.	O
</s>
<s>
In	O
Carcassonne	B-Application
,	O
Sam	O
is	O
confronted	O
by	O
Achriman	O
,	O
who	O
kills	O
Kenny	O
,	O
another	O
one	O
of	O
Sam	O
's	O
friends	O
,	O
in	O
front	O
of	O
him	O
before	O
fleeing	O
.	O
</s>
<s>
Sam	O
indicates	O
that	O
their	O
next	O
mission	O
will	O
be	O
in	O
Egypt	O
,	O
leading	O
to	O
the	O
events	O
of	O
Serious	B-Application
Sam	I-Application
3	I-Application
:	I-Application
BFE	I-Application
.	O
</s>
<s>
Development	O
of	O
Serious	B-Application
Sam	I-Application
4	I-Application
began	O
in	O
October	O
2012	O
.	O
</s>
<s>
The	O
game	O
was	O
confirmed	O
in	O
June	O
2013	O
,	O
when	O
the	O
website	O
Humble	O
Bundle	O
launched	O
a	O
"	O
Humble	O
Weekly	O
Sale	O
"	O
containing	O
several	O
past	O
games	O
from	O
the	O
Serious	B-Device
Sam	I-Device
series	O
to	O
help	O
fund	O
the	O
game	O
.	O
</s>
<s>
While	O
playtesting	O
the	O
game	O
's	O
"	O
jammer	O
"	O
feature	O
—	O
a	O
movable	O
device	O
that	O
could	O
disable	O
objects	O
in	O
a	O
certain	O
radius	O
—	O
the	O
development	O
team	O
devised	O
that	O
this	O
component	O
and	O
further	O
prospective	O
mechanics	O
would	O
better	O
fit	O
a	O
different	O
type	O
of	O
game	O
,	O
which	O
was	O
developed	O
as	O
The	B-Application
Talos	I-Application
Principle	I-Application
and	O
released	O
in	O
2014	O
.	O
</s>
<s>
In	O
September	O
2015	O
,	O
The	B-Application
Talos	I-Application
Principle	I-Application
co-writer	O
Jonas	O
Kyratzes	O
and	O
his	O
wife	O
,	O
Verena	O
,	O
were	O
announced	O
as	O
the	O
screenwriters	O
for	O
Serious	B-Application
Sam	I-Application
4	I-Application
.	O
</s>
<s>
Serious	B-Application
Sam	I-Application
4	I-Application
was	O
announced	O
under	O
the	O
name	O
Serious	B-Application
Sam	I-Application
4	I-Application
:	I-Application
Planet	I-Application
Badass	I-Application
in	O
April	O
2018	O
,	O
during	O
the	O
opening	O
of	O
the	O
Reboot	O
Develop	O
2018	O
conference	O
in	O
Croatia	O
,	O
with	O
a	O
teaser	O
trailer	O
.	O
</s>
<s>
In	O
May	O
2020	O
,	O
Serious	B-Application
Sam	I-Application
4	I-Application
was	O
re-announced	O
without	O
the	O
Planet	O
Badass	O
subtitle	O
and	O
with	O
a	O
release	O
window	O
of	O
August	O
2020	O
for	O
Microsoft	B-Application
Windows	I-Application
and	O
Stadia	B-Application
.	O
</s>
<s>
Devolver	O
Digital	O
stated	O
that	O
,	O
due	O
to	O
an	O
exclusivity	O
deal	O
with	O
Stadia	B-Application
,	O
versions	O
for	O
PlayStation	B-Operating_System
4	I-Operating_System
and	O
Xbox	B-Device
One	I-Device
had	O
been	O
postponed	O
to	O
early	O
2021	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
for	O
Xbox	B-Device
Series	I-Device
X/S	I-Device
(	O
including	O
via	O
Xbox	B-Application
Game	I-Application
Pass	I-Application
)	O
and	O
PlayStation	B-Device
5	I-Device
on	O
7	O
December	O
2021	O
.	O
</s>
<s>
Serious	B-Application
Sam	I-Application
4	I-Application
received	O
"	O
mixed	O
or	O
average	O
reviews	O
"	O
,	O
according	O
to	O
review	B-Application
aggregator	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
The	O
site	O
calculated	O
normalised	O
ratings	O
of	O
68/100	O
for	O
the	O
Microsoft	B-Application
Windows	I-Application
version	O
,	O
65/100	O
for	O
the	O
PlayStation	B-Device
5	I-Device
port	O
,	O
and	O
57/100	O
on	O
Xbox	B-Device
Series	I-Device
X/S	I-Device
.	O
</s>
