<s>
The	O
game	O
is	O
a	O
spin-off	O
from	O
Sega	O
's	O
Hatsune	B-Application
Miku	I-Application
:	I-Application
Project	I-Application
DIVA	I-Application
series	O
,	O
and	O
features	O
Crypton	O
Future	O
Media	O
's	O
virtual	O
singers	O
Hatsune	O
Miku	O
,	O
Megurine	O
Luka	O
,	O
Kagamine	O
Rin	O
and	O
Len	O
,	O
MEIKO	O
,	O
and	O
KAITO	O
,	O
alongside	O
the	O
cast	O
of	O
20	O
original	O
human	O
characters	O
that	O
are	O
split	O
into	O
five	O
units	O
,	O
each	O
with	O
a	O
unique	O
theme	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
for	O
Android	B-Application
and	O
Apple	B-Operating_System
devices	O
on	O
September	O
30	O
,	O
2020	O
.	O
</s>
<s>
It	O
was	O
developed	O
with	O
Unity	B-Application
,	O
and	O
uses	O
the	O
Piapro	O
Studio	O
NT	O
engine	O
for	O
voice	B-Application
synthesis	I-Application
.	O
</s>
<s>
Honami	O
loves	O
apple	B-Operating_System
pie	O
and	O
often	O
buys	O
it	O
in	O
bulk	O
,	O
something	O
she	O
considers	O
embarrassing	O
.	O
</s>
<s>
Nightcord	O
refers	O
to	O
the	O
online	O
voice-chat	O
platform	O
the	O
group	O
use	O
,	O
similar	O
to	O
the	O
real-life	O
chat	O
platform	O
Discord	B-Application
.	O
</s>
<s>
The	O
overall	O
gameplay	O
is	O
similar	O
to	O
Sega	O
's	O
Persona	O
Dancing	O
(	O
Atlus	O
)	O
,	O
Chunithm	B-Application
and	O
Bandai	O
Namco	O
's	O
The	B-Application
Idolmaster	I-Application
series	O
,	O
the	O
players	O
are	O
given	O
1,000	O
health	O
points	O
to	O
clear	O
a	O
song	O
,	O
and	O
one	O
can	O
adjust	O
song	O
speed	O
and	O
difficulty	O
to	O
their	O
liking	O
.	O
</s>
<s>
Such	O
talks	O
are	O
fully	O
voiced	O
with	O
2.5D	O
movement	O
via	O
Live2D	B-Operating_System
technology	O
,	O
and	O
their	O
conversations	O
are	O
depicted	O
in	O
a	O
visual	O
novel-style	O
presentation	O
that	O
is	O
prepared	O
for	O
each	O
group	O
,	O
including	O
the	O
Virtual	O
Singers	O
such	O
as	O
Miku	O
.	O
</s>
<s>
Although	O
Project	B-Application
Sekai	I-Application
is	O
a	O
free-to-play	O
game	O
,	O
players	O
can	O
spend	O
real-life	O
money	O
to	O
acquire	O
more	O
crystals	O
.	O
</s>
<s>
The	O
game	O
also	O
features	O
Virtual	B-General_Concept
Lives	I-General_Concept
,	O
a	O
mode	O
where	O
players	O
can	O
go	O
to	O
a	O
virtual	B-General_Concept
concert	I-General_Concept
,	O
similar	O
to	O
augmented	B-General_Concept
reality	I-General_Concept
or	O
a	O
Vocaloid	B-Application
live	O
concert	O
,	O
where	O
players	O
can	O
interact	O
with	O
one	O
another	O
.	O
</s>
<s>
The	O
tracklist	O
mainly	O
consists	O
of	O
Vocaloid	B-Application
songs	O
,	O
with	O
most	O
songs	O
having	O
two	O
versions	O
:	O
the	O
original	O
version	O
(	O
named	O
"	O
Virtual	O
Singer	O
version	O
"	O
in-game	O
)	O
,	O
and	O
Sekai	O
versions	O
,	O
having	O
the	O
song	O
covered	O
by	O
the	O
original	O
characters	O
,	O
and	O
sometimes	O
joined	O
by	O
a	O
Virtual	O
Singer	O
.	O
</s>
<s>
The	O
title	O
is	O
a	O
rhythm	O
game	O
that	O
features	O
arrangements	O
of	O
songs	O
made	O
by	O
various	O
artists	O
over	O
the	O
years	O
using	O
the	O
Vocaloid	B-Application
software	O
.	O
</s>
<s>
The	O
direction	O
of	O
the	O
game	O
's	O
design	O
and	O
concept	O
is	O
different	O
from	O
other	O
Hatsune	O
Miku-related	O
games	O
,	O
such	O
as	O
Sega	O
's	O
Hatsune	B-Application
Miku	I-Application
:	I-Application
Project	I-Application
DIVA	I-Application
,	O
where	O
the	O
player	O
and	O
Hatsune	O
Miku	O
face	O
each	O
other	O
directly	O
and	O
communicate	O
in	O
the	O
game	O
.	O
</s>
<s>
One	O
of	O
the	O
reasons	O
behind	O
this	O
format	O
was	O
the	O
idea	O
of	O
"	O
wanting	O
the	O
younger	O
generation	O
to	O
listen	O
to	O
more	O
Vocaloid	B-Application
music	O
and	O
other	O
songs	O
from	O
the	O
internet.	O
"	O
</s>
<s>
The	O
series	O
's	O
concept	O
was	O
also	O
borrowed	O
from	O
Persona	B-Application
5	I-Application
,	O
albeit	O
much	O
more	O
lighthearted	O
tone	O
.	O
</s>
<s>
The	O
game	O
's	O
worldwide	O
release	O
was	O
announced	O
in	O
August	O
2021	O
with	O
a	O
slightly	O
different	O
title	O
,	O
Hatsune	B-Application
Miku	I-Application
:	I-Application
Colorful	I-Application
Stage	I-Application
!	I-Application
.	O
</s>
<s>
The	O
original	O
songs	O
specially	O
commissioned	O
to	O
famous	O
Vocaloid	B-Application
producers	O
for	O
each	O
units	O
.	O
</s>
<s>
It	O
's	O
also	O
available	O
worldwide	O
through	O
online	O
music	O
streaming	O
services	O
,	O
such	O
as	O
Spotify	B-Application
,	O
Amazon	B-Application
Music	I-Application
,	O
and	O
Apple	B-Operating_System
Music	I-Operating_System
.	O
</s>
<s>
,	O
Project	B-Application
SEKAI	I-Application
has	O
reached	O
over	O
5	O
million	O
users	O
and	O
received	O
positive	O
reviews	O
.	O
</s>
<s>
The	O
game	O
was	O
ranked	O
9th	O
on	O
Twitter	B-Application
's	O
Most	O
Talked	O
About	O
Video	O
Games	O
list	O
in	O
2021	O
.	O
</s>
<s>
The	O
next	O
day	O
,	O
the	O
episode	O
was	O
withdrawn	O
indefinitely	O
and	O
a	O
public	O
apology	O
in	O
both	O
English	O
and	O
Japanese	O
was	O
uploaded	O
to	O
the	O
official	O
Project	B-Application
Sekai	I-Application
Twitter	B-Application
account	I-Application
.	O
</s>
<s>
There	O
was	O
also	O
paid	O
live	O
stream	O
held	O
on	O
Abema	B-Application
TV	I-Application
.	O
</s>
<s>
Project	B-Application
Sekai	I-Application
Championship	O
( プロジェクトセカイ	O
Championship	O
)	O
is	O
the	O
annual	O
tournament	O
of	O
the	O
game	O
Project	B-Application
Sekai	I-Application
:	O
Colorful	O
Stage	O
organized	O
by	O
SEGA	O
.	O
</s>
<s>
As	O
of	O
November	O
2022	O
,	O
SEGA	O
has	O
hosted	O
a	O
total	O
of	O
4	O
tournaments	O
of	O
the	O
Project	B-Application
Sekai	I-Application
game	O
title	O
.	O
</s>
