<s>
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
is	O
a	O
2019	O
video	O
game	O
developed	O
by	O
Vanillaware	O
and	O
published	O
by	O
Atlus	O
.	O
</s>
<s>
It	O
was	O
released	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
in	O
Japan	O
in	O
November	O
2019	O
and	O
worldwide	O
in	O
September	O
2020	O
,	O
with	O
a	O
Nintendo	B-Application
Switch	I-Application
version	O
released	O
in	O
April	O
2022	O
.	O
</s>
<s>
Director	O
and	O
writer	O
George	O
Kamitani	O
conceived	O
the	O
game	O
in	O
2013	O
following	O
the	O
completion	O
of	O
Dragon	B-Application
's	I-Application
Crown	I-Application
,	O
originally	O
pitching	O
it	O
for	O
a	O
toy	O
line	O
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
began	O
production	O
two	O
years	O
later	O
,	O
discarding	O
the	O
toy	O
line	O
element	O
under	O
Atlus	O
.	O
</s>
<s>
Originally	O
scheduled	O
for	O
a	O
2018	O
release	O
on	O
both	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
and	O
PlayStation	B-Device
Vita	I-Device
,	O
the	O
game	O
was	O
delayed	O
to	O
2019	O
with	O
the	O
Vita	O
version	O
being	O
canceled	O
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
is	O
a	O
video	O
game	O
where	O
players	O
take	O
control	O
of	O
thirteen	O
different	O
characters	O
,	O
who	O
interact	O
with	O
each	O
other	O
to	O
build	O
a	O
larger	O
narrative	O
.	O
</s>
<s>
The	O
character	O
stories	O
are	O
tracked	O
with	O
a	O
flowchart	B-Language
,	O
with	O
players	O
able	O
to	O
jump	O
between	O
scenes	O
to	O
try	O
different	O
keywords	O
from	O
the	O
Thought	O
Cloud	O
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
is	O
primarily	O
set	O
during	O
a	O
fictionalized	O
version	O
of	O
1985	O
in	O
the	O
Shōwa	O
period	O
,	O
but	O
also	O
jumps	O
between	O
1945	O
during	O
the	O
later	O
years	O
of	O
World	O
War	O
II	O
,	O
2025	O
,	O
2065	O
,	O
and	O
the	O
distant	O
future	O
of	O
2105	O
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
was	O
developed	O
by	O
Vanillaware	O
,	O
a	O
Japanese	O
game	O
developer	O
who	O
also	O
worked	O
on	O
Odin	B-Application
Sphere	I-Application
,	O
Dragon	B-Application
's	I-Application
Crown	I-Application
and	O
Muramasa	B-Application
:	I-Application
The	I-Application
Demon	I-Application
Blade	I-Application
,	O
notable	O
for	O
their	O
usage	O
of	O
2D	O
art	O
in	O
an	O
industry	O
predominated	O
by	O
the	O
usage	O
of	O
3D	O
graphics	O
.	O
</s>
<s>
Vanillaware	O
founder	O
George	O
Kamitani	O
,	O
who	O
also	O
directed	O
Odin	B-Application
Sphere	I-Application
and	O
Dragon	B-Application
's	I-Application
Crown	I-Application
,	O
returned	O
to	O
serve	O
as	O
director	O
for	O
the	O
game	O
while	O
handing	O
the	O
character	O
design	O
duties	O
to	O
Yukiko	O
Hirai	O
and	O
Emika	O
Kida	O
.	O
</s>
<s>
The	O
game	O
was	O
produced	O
by	O
Akiyasu	O
Yamamoto	O
of	O
Atlus	O
,	O
a	O
role	O
he	O
had	O
fulfilled	O
for	O
Odin	B-Application
Sphere	I-Application
.	O
</s>
<s>
The	O
concept	O
originated	O
in	O
2013	O
following	O
the	O
completion	O
of	O
Dragon	B-Application
's	I-Application
Crown	I-Application
.	O
</s>
<s>
He	O
also	O
wanted	O
something	O
on	O
a	O
much	O
smaller	O
scale	O
,	O
as	O
Dragon	B-Application
's	I-Application
Crown	I-Application
was	O
a	O
huge	O
project	O
for	O
him	O
.	O
</s>
<s>
He	O
was	O
about	O
to	O
push	O
forward	O
with	O
the	O
project	O
in	O
this	O
form	O
when	O
he	O
remembered	O
Atlus	O
had	O
been	O
given	O
right	O
of	O
first	O
refusal	O
as	O
part	O
of	O
their	O
contract	O
to	O
fund	O
Dragon	B-Application
's	I-Application
Crown	I-Application
.	O
</s>
<s>
Full	O
production	O
began	O
in	O
the	O
summer	O
of	O
2015	O
following	O
the	O
completion	O
of	O
remakes	O
of	O
Muramasa	O
(	O
Muramasa	B-Application
Rebirth	I-Application
)	O
and	O
Odin	B-Application
Sphere	I-Application
(	O
Odin	B-Application
Sphere	I-Application
Leifthrasir	O
)	O
.	O
</s>
<s>
The	O
game	O
was	O
originally	O
in	O
production	O
for	O
PlayStation	B-Operating_System
4	I-Operating_System
(	O
PS4	B-Operating_System
)	O
and	O
PlayStation	B-Device
Vita	I-Device
(	O
Vita	O
)	O
.	O
</s>
<s>
In	O
response	O
to	O
this	O
,	O
so	O
players	O
would	O
experience	O
what	O
to	O
expect	O
from	O
the	O
game	O
's	O
characters	O
and	O
narrative	O
,	O
a	O
demo-type	O
release	O
called	O
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
Prologue	O
was	O
developed	O
.	O
</s>
<s>
In	O
contrast	O
to	O
his	O
work	O
on	O
Odin	B-Application
Sphere	I-Application
,	O
where	O
he	O
had	O
created	O
the	O
overall	O
story	O
while	O
other	O
writers	O
worked	O
on	O
the	O
game	O
scenario	O
,	O
Kamitani	O
wrote	O
the	O
entire	O
scenario	O
of	O
the	O
game	O
himself	O
both	O
in	O
and	O
out	O
of	O
office	O
hours	O
over	O
the	O
course	O
of	O
three	O
years	O
.	O
</s>
<s>
Kamitani	O
wanted	O
to	O
create	O
a	O
mecha-themed	O
story	O
for	O
a	O
modern	O
audience	O
,	O
as	O
many	O
of	O
the	O
most	O
memorable	O
genre	O
works	O
(	O
Mobile	B-Application
Suit	I-Application
Gundam	I-Application
,	O
Neon	B-Application
Genesis	I-Application
Evangelion	I-Application
)	O
were	O
by	O
that	O
time	O
several	O
decades	O
old	O
.	O
</s>
<s>
Unlike	O
past	O
Vanillaware	O
games	O
like	O
Odin	B-Application
Sphere	I-Application
and	O
Muramasa	O
,	O
which	O
repeatedly	O
used	O
the	O
same	O
2D	O
background	O
environments	O
for	O
their	O
event	O
scenes	O
,	O
the	O
team	O
created	O
different	O
backgrounds	O
for	O
several	O
event	O
scenes	O
in	O
the	O
game	O
and	O
experimented	O
with	O
using	O
some	O
3D	O
assets	O
for	O
additional	O
layering	O
in	O
these	O
scenes	O
,	O
increasing	O
development	O
time	O
.	O
</s>
<s>
In	O
contrast	O
to	O
the	O
fantasy	O
landscapes	O
of	O
earlier	O
Vanillaware	O
titles	O
,	O
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
was	O
set	O
in	O
drabber	O
modern	O
environments	O
featuring	O
concrete	O
and	O
metal	O
.	O
</s>
<s>
The	O
battle	O
level	O
designs	O
were	O
directly	O
based	O
on	O
the	O
graphic	O
design	O
of	O
Gunparade	O
March	O
and	O
Fantavision	B-Application
,	O
with	O
the	O
blue-hued	O
character	O
portraits	O
being	O
based	O
on	O
the	O
monitor	O
displays	O
and	O
lighting	O
of	O
Alien	O
.	O
</s>
<s>
The	O
gameplay	O
concepts	O
drew	O
from	O
Vanillaware	O
's	O
earlier	O
game	O
GrimGrimoire	B-Application
,	O
with	O
the	O
balance	O
of	O
adventure	O
and	O
battle	O
sections	O
in	O
13	B-Application
Sentinels	I-Application
being	O
based	O
on	O
GrimGrimoires	B-Application
original	O
pitch	O
.	O
</s>
<s>
The	O
adventure	O
sections	O
were	O
designed	O
to	O
feel	O
like	O
the	O
gameplay	O
of	O
Shenmue	B-Application
,	O
expressing	O
the	O
classic	O
style	O
of	O
adventure	O
games	O
with	O
a	O
more	O
intuitive	O
interface	O
design	O
and	O
response	O
,	O
for	O
which	O
the	O
Cloud	O
system	O
was	O
designed	O
.	O
</s>
<s>
As	O
the	O
StarCraft-based	O
battles	O
of	O
GrimGrimoire	B-Application
had	O
met	O
with	O
a	O
mixed	O
response	O
in	O
Japan	O
,	O
Kamitani	O
combined	O
it	O
with	O
elements	O
of	O
the	O
tower	B-Application
defense	I-Application
genre	O
popular	O
in	O
the	O
region	O
.	O
</s>
<s>
Though	O
Kikuchi	O
and	O
Watanabe	O
were	O
new	O
to	O
Vanillaware	O
titles	O
,	O
both	O
Kudo	O
and	O
Kaneda	O
had	O
worked	O
with	O
the	O
studio	O
on	O
Odin	B-Application
Sphere	I-Application
and	O
Muramasa	O
.	O
</s>
<s>
The	O
album	O
also	O
released	O
digitally	O
worldwide	O
through	O
iTunes	B-Operating_System
.	O
</s>
<s>
A	O
mini	O
soundtrack	O
featuring	O
ten	O
tracks	O
from	O
the	O
game	O
was	O
packaged	O
with	O
the	O
special	O
edition	O
of	O
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
Prologue	O
.	O
</s>
<s>
It	O
was	O
also	O
released	O
as	O
a	O
worldwide	O
digital	O
release	O
on	O
iTunes	B-Operating_System
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
was	O
announced	O
at	O
the	O
2015	O
Tokyo	O
Game	O
Show	O
.	O
</s>
<s>
Prior	O
to	O
the	O
announcement	O
,	O
the	O
game	O
was	O
teased	O
in	O
a	O
preview	O
video	O
in	O
July	O
as	O
a	O
collaboration	O
project	O
between	O
Atlus	O
and	O
Vanillaware	O
following	O
the	O
public	O
reveal	O
of	O
Odin	B-Application
Sphere	I-Application
:	O
Leifthrasir	O
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
Prologue	O
was	O
released	O
in	O
Japan	O
on	O
March	O
14	O
,	O
2019	O
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
was	O
originally	O
set	O
to	O
be	O
released	O
outside	O
of	O
Japan	O
on	O
September	O
8	O
,	O
2020	O
,	O
before	O
being	O
delayed	O
until	O
September	O
22	O
.	O
</s>
<s>
Doyon	O
referred	O
to	O
13	B-Application
Sentinels	I-Application
as	O
one	O
of	O
her	O
favorite	O
video	O
game	O
project	O
up	O
to	O
that	O
point	O
in	O
her	O
career	O
.	O
</s>
<s>
A	O
Nintendo	B-Application
Switch	I-Application
version	O
was	O
released	O
on	O
April	O
12	O
,	O
2022	O
,	O
in	O
the	O
West	O
and	O
two	O
days	O
later	O
in	O
Japan	O
.	O
</s>
<s>
An	O
August	O
patch	O
added	O
the	O
Switch	O
port	O
additions	O
and	O
updates	O
to	O
the	O
PS4	B-Operating_System
version	O
.	O
</s>
<s>
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
received	O
"	O
generally	O
favorable	O
"	O
reviews	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
<s>
In	O
an	O
update	O
to	O
the	O
original	O
review	O
,	O
Kemps	O
noted	O
that	O
very	O
little	O
was	O
graphically	O
lost	O
in	O
the	O
transition	O
from	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
version	O
to	O
the	O
Nintendo	B-Application
Switch	I-Application
version	O
,	O
calling	O
the	O
port	O
"	O
superb	O
"	O
.	O
</s>
<s>
In	O
their	O
fiscal	O
report	O
,	O
Atlus	O
said	O
that	O
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
exceeded	O
their	O
sales	O
expectations	O
.	O
</s>
<s>
In	O
IGNs	O
"	O
Best	O
of	O
2020	O
"	O
,	O
13	B-Application
Sentinels	I-Application
:	I-Application
Aegis	I-Application
Rim	I-Application
was	O
one	O
of	O
the	O
nominees	O
in	O
their	O
"	O
Best	O
Adventure/Puzzle	O
"	O
and	O
"	O
Best	O
Video	O
Game	O
Art	O
Design	O
"	O
categories	O
.	O
</s>
