<s>
The	B-Application
Room	I-Application
:	I-Application
Old	I-Application
Sins	I-Application
or	O
The	O
Room	O
4	O
:	O
Old	O
Sins	O
is	O
a	O
puzzle	O
video	O
game	O
developed	O
by	O
Fireproof	O
Games	O
,	O
and	O
the	O
fourth	O
game	O
in	O
their	O
series	O
,	O
The	O
Room	O
.	O
</s>
<s>
Like	O
the	O
preceding	O
games	O
,	O
The	B-Application
Room	I-Application
:	I-Application
Old	I-Application
Sins	I-Application
is	O
a	O
variation	O
on	O
escape	B-Application
the	I-Application
room	I-Application
games	O
,	O
in	O
which	O
the	O
player	O
is	O
presented	O
with	O
a	O
highly-detailed	O
dollhouse	O
to	O
examine	O
and	O
find	O
various	O
secrets	O
within	O
it	O
by	O
manipulating	O
objects	O
within	O
it	O
and	O
solving	O
its	O
puzzles	O
.	O
</s>
<s>
Like	O
previous	O
titles	O
,	O
The	B-Application
Room	I-Application
:	I-Application
Old	I-Application
Sins	I-Application
was	O
developed	O
using	O
the	O
Unity	B-Application
game	I-Application
engine	I-Application
.	O
</s>
<s>
The	O
game	O
was	O
announced	O
on	O
6	O
March	O
2017	O
and	O
was	O
released	O
on	O
iOS	B-Application
on	O
23	O
January	O
2018	O
.	O
</s>
<s>
When	O
discussing	O
the	O
delay	O
for	O
Android	B-Application
version	O
,	O
Fireproof	O
Games	O
explained	O
there	O
were	O
multiple	O
reported	O
bugs	O
that	O
needed	O
to	O
be	O
fixed	O
first	O
on	O
the	O
iOS	B-Application
version	O
before	O
they	O
could	O
focus	O
on	O
the	O
Android	B-Application
version	O
.	O
</s>
<s>
For	O
The	B-Application
Room	I-Application
:	I-Application
Old	I-Application
Sins	I-Application
specifically	O
,	O
they	O
've	O
restricted	O
themselves	O
to	O
OpenGL	O
ES3.0	O
,	O
making	O
it	O
easier	O
for	O
them	O
to	O
develop	O
the	O
game	O
.	O
</s>
<s>
Before	O
the	O
Android	B-Application
release	O
on	O
19	O
April	O
,	O
the	O
game	O
had	O
an	O
open	O
beta	O
.	O
</s>
<s>
Fireproof	O
released	O
the	O
Windows	O
version	O
The	B-Application
Room	I-Application
:	I-Application
Old	I-Application
Sins	I-Application
on	O
11	O
February	O
2021	O
.	O
</s>
<s>
The	B-Application
Room	I-Application
:	I-Application
Old	I-Application
Sins	I-Application
gained	O
critical	O
acclaim	O
,	O
with	O
Metacritic	O
giving	O
a	O
Metascore	O
of	O
86	O
out	O
of	O
100	O
based	O
on	O
8	O
critics	O
.	O
</s>
<s>
Game	O
Informer	O
said	O
"	O
The	B-Application
Room	I-Application
:	I-Application
Old	I-Application
Sins	I-Application
is	O
already	O
one	O
of	O
the	O
year	O
's	O
best	O
mobile	O
games	O
"	O
and	O
gave	O
it	O
a	O
score	O
of	O
8.3/10	O
.	O
</s>
