<s>
Chaos	B-Application
;	I-Application
Head	I-Application
(	O
stylized	O
as	O
ChäoS	B-Application
;	I-Application
HEAd	I-Application
)	O
is	O
a	O
2008	O
science	O
fiction	O
visual	O
novel	O
video	O
game	O
developed	O
by	O
5pb	O
.	O
</s>
<s>
It	O
is	O
the	O
first	O
game	O
in	O
the	O
Science	B-Application
Adventure	I-Application
series	I-Application
.	O
</s>
<s>
Following	O
the	O
original	O
Windows	B-Application
release	O
,	O
the	O
enhanced	O
version	O
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
was	O
released	O
for	O
Xbox	B-Operating_System
360	I-Operating_System
in	O
2009	O
,	O
and	O
has	O
since	O
been	O
ported	O
to	O
multiple	O
platforms	O
.	O
</s>
<s>
An	O
English	O
localization	O
was	O
released	O
by	O
Spike	O
Chunsoft	O
for	O
Nintendo	B-Application
Switch	I-Application
and	O
Windows	B-Application
in	O
2022	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
direct	O
sequel	O
Chaos	B-Application
;	I-Application
Head	I-Application
Love	I-Application
Chu	I-Application
Chu	I-Application
!	I-Application
</s>
<s>
and	O
the	O
thematic	O
sequel	O
Chaos	B-Application
;	I-Application
Child	I-Application
,	O
manga	O
,	O
an	O
anime	O
series	O
,	O
and	O
an	O
internet	O
radio	O
show	O
based	O
on	O
Chaos	B-Application
;	I-Application
Head	I-Application
have	O
been	O
produced	O
.	O
</s>
<s>
Chaos	B-Application
;	I-Application
Head	I-Application
is	O
a	O
visual	O
novel	O
game	O
in	O
which	O
the	O
player	O
takes	O
the	O
role	O
of	O
Takumi	O
Nishijou	O
,	O
an	O
otaku	O
and	O
shut-in	O
,	O
who	O
experiences	O
delusions	O
.	O
</s>
<s>
In	O
the	O
updated	O
re-release	O
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
,	O
further	O
endings	O
are	O
possible	O
to	O
reach	O
,	O
also	O
by	O
choosing	O
what	O
delusions	O
to	O
experience	O
.	O
</s>
<s>
She	O
makes	O
such	O
a	O
sword	O
materialize	O
in	O
her	O
hands	O
,	O
and	O
tells	O
him	O
about	O
how	O
Takumi	O
,	O
the	O
girl	O
carrying	O
the	O
sword	O
–	O
Sena	O
Aoi	O
–	O
and	O
her	O
friend	O
Kozue	O
Orihara	O
are	O
Gigalomaniacs	B-Application
:	O
people	O
with	O
the	O
ability	O
to	O
project	O
delusions	O
into	O
reality	O
,	O
which	O
is	O
called	O
"	O
real-booting	O
"	O
.	O
</s>
<s>
The	O
Nozomi	O
Group	O
,	O
a	O
technology	O
company	O
in	O
Shibuya	O
,	O
is	O
revealed	O
to	O
be	O
using	O
their	O
Noah	O
II	O
machine	O
to	O
synthetically	O
use	O
Gigalomaniac	B-Application
power	O
,	O
and	O
have	O
staff	O
carrying	O
transmitters	O
to	O
increase	O
Noah	O
II	O
's	O
signal	O
reach	O
.	O
</s>
<s>
His	O
sister	O
Nanami	O
is	O
held	O
in	O
the	O
location	O
of	O
the	O
real	O
Noah	O
II	O
,	O
where	O
she	O
is	O
made	O
to	O
awaken	O
as	O
a	O
Gigalomaniac	B-Application
and	O
obtain	O
a	O
DI-sword	O
.	O
</s>
<s>
Rimi	O
–	O
also	O
a	O
Gigalomaniac	B-Application
–	O
tries	O
to	O
save	O
her	O
,	O
but	O
is	O
attacked	O
by	O
Norose	O
and	O
taken	O
prisoner	O
in	O
Nanami	O
's	O
stead	O
.	O
</s>
<s>
Shogun	O
again	O
meets	O
with	O
Takumi	O
to	O
tell	O
him	O
that	O
he	O
had	O
intended	O
to	O
stop	O
Nozomi	O
from	O
taking	O
over	O
humanity	O
with	O
Noah	O
II	O
,	O
but	O
that	O
his	O
body	O
–	O
aged	O
from	O
disease	O
and	O
overuse	O
of	O
Gigalomaniac	B-Application
powers	O
–	O
hindered	O
him	O
,	O
prompting	O
him	O
to	O
create	O
Takumi	O
to	O
do	O
it	O
in	O
his	O
stead	O
.	O
</s>
<s>
An	O
earthquake	O
occurs	O
,	O
destroying	O
much	O
of	O
Shibuya	O
;	O
Takumi	O
rescues	O
the	O
other	O
Gigalomaniacs	B-Application
from	O
the	O
destruction	O
,	O
and	O
continues	O
to	O
the	O
location	O
of	O
Noah	O
II	O
.	O
</s>
<s>
He	O
fights	O
Norose	O
,	O
but	O
Noah	O
II	O
overwhelms	O
him	O
with	O
delusions	O
;	O
he	O
reaffirms	O
his	O
existence	O
with	O
the	O
help	O
of	O
the	O
other	O
Gigalomaniacs	B-Application
 '	O
delusion	O
synchronization	O
,	O
and	O
destroys	O
Norose	O
and	O
Noah	O
II	O
with	O
his	O
DI-sword	O
.	O
</s>
<s>
In	O
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
,	O
players	O
are	O
locked	O
onto	O
the	O
"	O
Silent	O
Sky	O
"	O
route	O
the	O
first	O
time	O
they	O
play	O
the	O
game	O
–	O
similar	O
to	O
the	O
original	O
's	O
"	O
A	O
"	O
route	O
–	O
and	O
it	O
also	O
features	O
additional	O
routes	O
dedicated	O
to	O
the	O
female	O
main	O
cast	O
.	O
</s>
<s>
Chaos	B-Application
;	I-Application
Head	I-Application
was	O
developed	O
in	O
a	O
collaboration	O
between	O
5pb	O
.	O
</s>
<s>
He	O
described	O
the	O
main	O
image	O
for	O
the	O
game	O
's	O
sound	O
as	O
"	O
rainy	O
"	O
,	O
compared	O
to	O
the	O
later	O
Science	B-Application
Adventure	I-Application
games	O
Steins	B-Application
;	I-Application
Gate	I-Application
,	O
Robotics	O
;	O
Notes	O
and	O
Chaos	B-Application
;	I-Application
Child	I-Application
,	O
which	O
he	O
called	O
"	O
cloudy	O
"	O
,	O
"	O
clear	O
weather	O
"	O
and	O
"	O
stormy	O
"	O
,	O
respectively	O
.	O
</s>
<s>
Chaos	B-Application
;	I-Application
Head	I-Application
was	O
originally	O
announced	O
under	O
the	O
title	O
,	O
and	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
on	O
April	O
25	O
,	O
2008	O
,	O
by	O
Nitroplus	O
.	O
</s>
<s>
Around	O
June	O
2008	O
,	O
the	O
developers	O
decided	O
to	O
port	O
the	O
game	O
to	O
Xbox	B-Operating_System
360	I-Operating_System
with	O
added	O
content	O
:	O
this	O
version	O
was	O
released	O
on	O
February	O
26	O
,	O
2009	O
,	O
as	O
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
.	O
</s>
<s>
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
was	O
ported	O
to	O
multiple	O
platforms	O
,	O
including	O
PlayStation	B-Operating_System
Portable	I-Operating_System
on	O
June	O
24	O
,	O
2010	O
,	O
iOS	B-Application
on	O
November	O
18	O
,	O
2010	O
,	O
Android	B-Application
on	O
January	O
24	O
,	O
2012	O
,	O
and	O
PlayStation	B-Operating_System
3	I-Operating_System
on	O
November	O
22	O
,	O
2012	O
.	O
</s>
<s>
While	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
was	O
rated	O
Z	O
(	O
18	O
years	O
and	O
up	O
)	O
by	O
CERO	O
,	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
and	O
PlayStation	B-Operating_System
3	I-Operating_System
versions	O
were	O
edited	O
to	O
be	O
able	O
to	O
be	O
released	O
with	O
a	O
D	O
rating	O
(	O
17	O
years	O
and	O
up	O
)	O
.	O
</s>
<s>
The	O
PlayStation	B-Device
Vita	I-Device
version	O
bundled	O
the	O
Z-rated	O
version	O
with	O
the	O
follow-up	O
game	O
Chaos	B-Application
;	I-Application
Head	I-Application
Love	I-Application
Chu	I-Application
Chu	I-Application
!	I-Application
</s>
<s>
under	O
the	O
title	O
Chaos	B-Application
;	I-Application
Head	I-Application
Dual	I-Application
,	O
and	O
was	O
released	O
on	O
August	O
21	O
,	O
2014	O
.	O
</s>
<s>
Another	O
bundle	O
,	O
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
/	O
Chaos	B-Application
;	I-Application
Child	I-Application
Double	O
Pack	O
–	O
also	O
known	O
as	O
Chaos	O
;	O
Double	O
Pack	O
–	O
collects	O
Noah	O
and	O
Chaos	B-Application
;	I-Application
Child	I-Application
,	O
and	O
was	O
released	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
on	O
February	O
24	O
,	O
2022	O
,	O
with	O
high-definition	O
graphics	O
.	O
</s>
<s>
In	O
2018	O
,	O
Shikura	O
responded	O
to	O
fan	O
requests	O
on	O
Twitter	B-Application
,	O
saying	O
that	O
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
"	O
probably	O
"	O
would	O
be	O
released	O
in	O
English	O
,	O
and	O
in	O
February	O
2022	O
,	O
Mages	O
asked	O
people	O
to	O
wait	O
for	O
information	O
on	O
an	O
English	O
release	O
.	O
</s>
<s>
In	O
July	O
2022	O
,	O
Spike	O
Chunsoft	O
announced	O
that	O
the	O
standalone	O
version	O
of	O
Noah	O
would	O
be	O
available	O
on	O
Windows	B-Application
via	O
Steam	B-Application
on	O
the	O
same	O
date	O
.	O
</s>
<s>
However	O
,	O
edits	O
found	O
within	O
Steam	B-Application
Database	O
in	O
August	O
2022	O
led	O
to	O
rumors	O
about	O
Chaos	B-Application
;	I-Application
Head	I-Application
being	O
preemptively	O
banned	O
from	O
the	O
platform	O
.	O
</s>
<s>
The	O
release	O
was	O
initially	O
cancelled	O
on	O
September	O
30	O
,	O
citing	O
Steam	B-Application
's	O
guidelines	O
requiring	O
changes	O
to	O
the	O
game	O
's	O
content	O
;	O
but	O
on	O
October	O
6	O
,	O
Spike	O
Chunsoft	O
announced	O
that	O
Valve	O
had	O
reversed	O
their	O
decision	O
,	O
allowing	O
Noah	O
to	O
be	O
released	O
on	O
the	O
platform	O
as	O
originally	O
planned	O
.	O
</s>
<s>
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
received	O
"	O
mixed	O
or	O
average	O
"	O
reviews	O
according	O
to	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
<s>
The	O
game	O
was	O
a	O
commercial	O
success	O
,	O
and	O
,	O
together	O
with	O
Steins	B-Application
;	I-Application
Gate	I-Application
,	O
helped	O
establish	O
5pb	O
.	O
</s>
<s>
One	O
month	O
before	O
the	O
game	O
's	O
original	O
April	O
2008	O
release	O
,	O
Chaos	B-Application
;	I-Application
Head	I-Application
was	O
the	O
fourth	O
most	O
pre-ordered	O
PC	O
game	O
in	O
Japan	O
.	O
</s>
<s>
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
was	O
the	O
eleventh	O
best	O
selling	O
video	O
game	O
of	O
the	O
week	O
in	O
Japan	O
during	O
its	O
debut	O
week	O
,	O
with	O
18,000	O
copies	O
sold	O
.	O
</s>
<s>
He	O
also	O
noted	O
that	O
the	O
game	O
was	O
short	O
compared	O
to	O
the	O
later	O
Science	B-Application
Adventure	I-Application
games	O
,	O
and	O
that	O
the	O
main	O
characters	O
never	O
come	O
together	O
as	O
a	O
group	O
and	O
are	O
not	O
a	O
vital	O
part	O
of	O
Takumi	O
's	O
life	O
,	O
with	O
Takumi	O
instead	O
"	O
wandering	O
in	O
and	O
out	O
of	O
their	O
stories	O
"	O
.	O
</s>
<s>
Despite	O
this	O
,	O
he	O
found	O
the	O
plot	O
and	O
world	O
gripping	O
,	O
and	O
said	O
that	O
the	O
game	O
was	O
not	O
bad	O
,	O
but	O
that	O
it	O
"	O
might	O
as	O
well	O
be	O
nothing	O
"	O
compared	O
to	O
Steins	B-Application
;	I-Application
Gate	I-Application
.	O
</s>
<s>
Kowachi	O
from	O
Dengeki	O
Online	O
recommended	O
Chaos	B-Application
;	I-Application
Head	I-Application
Dual	I-Application
for	O
having	O
characters	O
rich	O
in	O
personality	O
and	O
a	O
unique	O
protagonist	O
,	O
and	O
praised	O
how	O
Takumi	O
grew	O
as	O
a	O
character	O
throughout	O
the	O
story	O
.	O
</s>
<s>
Game	O
Informer	O
included	O
Chaos	B-Application
;	I-Application
Head	I-Application
on	O
a	O
list	O
of	O
games	O
they	O
wanted	O
to	O
see	O
localized	O
;	O
they	O
considered	O
an	O
English	O
version	O
likely	O
due	O
to	O
Steins	B-Application
;	I-Application
Gate	I-Application
English	O
release	O
in	O
2014	O
.	O
</s>
<s>
After	O
the	O
release	O
of	O
the	O
official	O
English	O
localization	O
of	O
Chaos	B-Application
;	I-Application
Head	I-Application
Noah	I-Application
in	O
October	O
2022	O
,	O
the	O
quality	O
of	O
the	O
localization	O
was	O
criticized	O
by	O
Kiri	O
Kiri	O
Basara	O
as	O
being	O
subpar	O
.	O
</s>
<s>
Chaos	B-Application
;	I-Application
Head	I-Application
has	O
seen	O
several	O
adaptations	O
and	O
tie-in	O
media	O
.	O
</s>
<s>
The	O
internet	O
radio	O
show	O
Chaos	B-Application
;	I-Application
Head	I-Application
Radio	O
Delusional	O
Radio	O
Channel	O
began	O
airing	O
on	O
March	O
28	O
,	O
2008	O
,	O
to	O
help	O
promote	O
the	O
game	O
and	O
was	O
hosted	O
by	O
Takumi	O
and	O
Rimi	O
's	O
voice	O
actors	O
,	O
Yoshino	O
Hiroyuki	O
and	O
Kitamura	O
Eri	O
.	O
</s>
<s>
A	O
second	O
manga	O
,	O
Sakaki	O
Nagako	O
's	O
Chaos	B-Application
;	I-Application
Head	I-Application
:	O
Blue	O
Complex	O
,	O
adapting	O
the	O
events	O
of	O
the	O
story	O
from	O
the	O
character	O
Sena	O
Aoi	O
's	O
perspective	O
,	O
began	O
serialization	O
in	O
Media	O
Factory	O
's	O
seinen	O
magazine	O
Monthly	O
Comic	O
Alive	O
on	O
September	O
27	O
,	O
2008	O
.	O
</s>
<s>
A	O
romantic	O
comedy	O
manga	O
adaptation	O
,	O
Mizuki	O
Takehito	O
's	O
Chaos	B-Application
;	I-Application
Head	I-Application
H	O
,	O
was	O
serialized	O
by	O
Jive	O
in	O
Comic	O
Rush	O
beginning	O
on	O
September	O
26	O
,	O
2008	O
.	O
</s>
<s>
After	O
it	O
was	O
made	O
,	O
Head	O
's	O
popularity	O
was	O
used	O
to	O
sell	O
the	O
visual	O
novel	O
Steins	B-Application
;	I-Application
Gate	I-Application
,	O
which	O
would	O
go	O
on	O
to	O
be	O
even	O
more	O
successful	O
.	O
</s>
<s>
It	O
was	O
also	O
used	O
as	O
the	O
base	O
for	O
the	O
rest	O
of	O
the	O
Science	B-Application
Adventure	I-Application
series	I-Application
as	O
well	O
,	O
with	O
every	O
main	O
entry	O
having	O
major	O
connections	O
to	O
Chaos	B-Application
;	I-Application
Head	I-Application
.	O
</s>
<s>
Two	O
video	O
games	O
directly	O
based	O
on	O
Chaos	B-Application
;	I-Application
Head	I-Application
have	O
been	O
made	O
:	O
the	O
direct	O
sequel	O
Chaos	B-Application
;	I-Application
Head	I-Application
Love	I-Application
Chu	I-Application
Chu	I-Application
!	I-Application
</s>
<s>
and	O
the	O
thematic	O
sequel	O
Chaos	B-Application
;	I-Application
Child	I-Application
.	O
</s>
<s>
Additionally	O
,	O
Shikura	O
has	O
said	O
that	O
he	O
wants	O
to	O
create	O
an	O
erotic	O
video	O
game	O
based	O
on	O
Chaos	B-Application
;	I-Application
Head	I-Application
and	O
Chaos	B-Application
;	I-Application
Child	I-Application
,	O
targeting	O
adults	O
.	O
</s>
<s>
The	O
Chaos	B-Application
;	I-Application
Child	I-Application
anime	O
adaptation	O
also	O
includes	O
an	O
adaptation	O
of	O
Chaos	B-Application
;	I-Application
Head	I-Application
as	O
part	O
of	O
its	O
"	O
episode	O
0	O
"	O
recap	O
.	O
</s>
<s>
The	O
2009	O
visual	O
novel	O
Full	B-Application
Metal	I-Application
Daemon	I-Application
Muramasa	I-Application
,	O
Nitroplus	O
's	O
tenth	O
anniversary	O
project	O
,	O
features	O
a	O
Chaos	B-Application
;	I-Application
Head	I-Application
cameo	O
during	O
a	O
scene	O
calling	O
back	O
to	O
many	O
of	O
Nitroplus	O
's	O
previously	O
published	O
works	O
.	O
</s>
