<s>
Ultimate	B-Application
Custom	I-Application
Night	I-Application
is	O
a	O
freeware	B-License
point-and-click	O
survival	O
horror	O
video	O
game	O
developed	O
and	O
published	O
by	O
Scott	O
Cawthon	O
.	O
</s>
<s>
It	O
is	O
the	O
second	O
spin-off	O
installment	O
in	O
the	O
Five	B-Application
Nights	I-Application
at	I-Application
Freddy	I-Application
's	I-Application
series	O
,	O
and	O
the	O
eighth	O
game	O
overall	O
.	O
</s>
<s>
Originally	O
announced	O
as	O
downloadable	B-Protocol
content	I-Protocol
for	O
2017	O
's	O
Freddy	B-Application
Fazbear	I-Application
's	I-Application
Pizzeria	I-Application
Simulator	I-Application
,	O
the	O
game	O
was	O
later	O
turned	O
into	O
a	O
standalone	O
release	O
due	O
to	O
its	O
size	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
Steam	B-Application
and	O
Game	O
Jolt	O
on	O
June	O
27	O
,	O
2018	O
.	O
</s>
<s>
A	O
mobile	O
port	O
for	O
iOS	B-Application
and	O
Android	B-Application
was	O
released	O
on	O
April	O
28	O
,	O
2020	O
,	O
and	O
a	O
console	O
port	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
,	O
Xbox	B-Device
One	I-Device
,	O
and	O
Nintendo	B-Application
Switch	I-Application
was	O
released	O
on	O
April	O
30	O
,	O
2021	O
.	O
</s>
<s>
A	O
sequel	O
,	O
Five	B-Application
Nights	I-Application
at	I-Application
Freddy	I-Application
's	I-Application
:	I-Application
Help	I-Application
Wanted	I-Application
,	O
was	O
released	O
on	O
May	O
28	O
,	O
2019	O
.	O
</s>
<s>
The	O
game	O
allows	O
the	O
player	O
character	O
to	O
choose	O
from	O
50	O
characters	O
from	O
the	O
first	O
six	O
main	O
Five	B-Application
Nights	I-Application
at	I-Application
Freddy	I-Application
's	I-Application
games	O
and	O
FNaF	B-Operating_System
World	I-Operating_System
,	O
and	O
set	O
their	O
difficulty	O
levels	O
for	O
the	O
night	O
from	O
a	O
minimum	O
of	O
"	O
0	O
"	O
to	O
a	O
maximum	O
of	O
"	O
20	O
"	O
.	O
</s>
<s>
Of	O
these	O
extra	O
nine	O
,	O
Dee	O
Dee	O
from	O
FNaF	B-Operating_System
World	I-Operating_System
has	O
the	O
ability	O
to	O
randomly	O
spawn	O
and	O
summon	O
either	O
a	O
character	O
that	O
is	O
n't	O
currently	O
active	O
or	O
one	O
of	O
six	O
that	O
are	O
unavailable	O
to	O
the	O
player	O
.	O
</s>
<s>
While	O
Ultimate	B-Application
Custom	I-Application
Night	I-Application
is	O
not	O
as	O
narrative-focused	O
as	O
previous	O
installments	O
in	O
the	O
series	O
,	O
players	O
have	O
still	O
come	O
up	O
with	O
several	O
interprations	O
of	O
the	O
game	O
.	O
</s>
<s>
The	O
most	O
widely	O
accepted	O
theory	O
is	O
that	O
players	O
assume	O
the	O
role	O
of	O
William	O
Afton	O
,	O
the	O
franchise	O
's	O
main	O
antagonist	O
,	O
who	O
is	O
trapped	O
in	O
a	O
purgatory-like	O
state	O
after	O
the	O
events	O
of	O
Freddy	B-Application
Fazbear	I-Application
's	I-Application
Pizzeria	I-Application
Simulator	I-Application
,	O
and	O
that	O
Afton	O
's	O
repeated	O
deaths	O
at	O
the	O
hands	O
of	O
the	O
animatronics	O
he	O
had	O
helped	O
to	O
create	O
are	O
a	O
form	O
of	O
punishment	O
for	O
his	O
crimes	O
.	O
</s>
<s>
This	O
theory	O
is	O
supported	O
by	O
an	O
easter	O
egg	O
that	O
is	O
accessible	O
by	O
having	O
Old	O
Man	O
Consequences	O
(	O
from	O
FNaF	B-Operating_System
World	I-Operating_System
)	O
be	O
the	O
only	O
active	O
character	O
on	O
a	O
night	O
and	O
set	O
to	O
"	O
1	O
"	O
difficulty	O
.	O
</s>
<s>
In	O
February	O
2018	O
,	O
after	O
the	O
release	O
of	O
Freddy	B-Application
Fazbear	I-Application
's	I-Application
Pizzeria	I-Application
Simulator	I-Application
,	O
Cawthon	O
announced	O
in	O
a	O
Steam	B-Application
post	O
that	O
he	O
would	O
think	O
about	O
gaining	O
help	O
from	O
larger	O
publishers	O
in	O
making	O
future	O
games	O
.	O
</s>
<s>
In	O
an	O
edited	O
version	O
of	O
the	O
same	O
post	O
,	O
he	O
added	O
that	O
he	O
would	O
be	O
developing	O
an	O
"	O
ultimate	B-Application
custom	I-Application
night	I-Application
"	O
add-on	O
for	O
Freddy	B-Application
Fazbear	I-Application
's	I-Application
Pizzeria	I-Application
Simulator	I-Application
,	O
which	O
,	O
as	O
revealed	O
on	O
his	O
website	O
,	O
would	O
have	O
more	O
than	O
50	O
animatronics	O
from	O
the	O
entire	O
series	O
attacking	O
the	O
player	O
.	O
</s>
<s>
As	O
he	O
was	O
programming	O
the	O
characters	O
in	O
the	O
game	O
,	O
he	O
would	O
update	O
the	O
"	O
progress	O
bar	O
"	O
on	O
his	O
website	O
,	O
along	O
with	O
a	O
brief	O
description	O
of	O
the	O
characters	O
on	O
a	O
Steam	B-Application
post	O
.	O
</s>
<s>
However	O
,	O
on	O
June	O
22	O
,	O
in	O
a	O
Steam	B-Application
post	O
by	O
Cawthon	O
,	O
he	O
revealed	O
that	O
he	O
had	O
planned	O
to	O
release	O
the	O
game	O
on	O
that	O
day	O
,	O
but	O
he	O
had	O
promised	O
YouTuber	O
Lewis	O
Dawkins	O
(	O
a.k.a.	O
</s>
<s>
Ultimate	B-Application
Custom	I-Application
Night	I-Application
received	O
mostly	O
positive	O
reviews	O
.	O
</s>
