<s>
Osu	B-Application
!	I-Application
</s>
<s>
(	O
stylized	O
as	O
osu	B-Application
!	I-Application
)	O
</s>
<s>
is	O
a	O
free-to-play	O
rhythm	O
game	O
primarily	O
developed	O
,	O
published	O
,	O
and	O
created	O
by	O
Dean	B-Application
"	I-Application
peppy	I-Application
"	I-Application
Herbert	I-Application
.	O
</s>
<s>
Inspired	O
by	O
iNiS	O
 '	O
rhythm	O
game	O
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	O
,	O
it	O
was	O
written	O
in	O
C#	B-Application
on	O
the	O
.NET	B-Application
Framework	I-Application
,	O
and	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
on	O
16	O
September	O
2007	O
.	O
</s>
<s>
The	O
game	O
has	O
throughout	O
the	O
years	O
been	O
ported	O
to	O
macOS	B-Application
,	O
Linux	B-Application
,	O
Android	B-Application
and	O
iOS	B-Application
.	O
</s>
<s>
Aside	O
from	O
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	O
,	O
the	O
game	O
has	O
been	O
inspired	O
by	O
titles	O
such	O
as	O
Taiko	B-Application
no	I-Application
Tatsujin	I-Application
,	O
Beatmania	B-Application
IIDX	I-Application
,	O
EZ2DJ	B-Application
(	O
EZ2CATCH	O
)	O
,	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
,	O
O2Jam	O
,	O
StepMania	B-Language
,	O
and	O
DJMax	B-Application
.	O
</s>
<s>
There	O
are	O
four	O
official	O
game	O
modes	O
:	O
"	O
osu	B-Application
!	I-Application
"	O
</s>
<s>
(	O
called	O
"	O
osu	B-Application
!	I-Application
</s>
<s>
standard	O
"	O
)	O
,	O
"	O
osu	B-Application
!	I-Application
taiko	I-Application
"	O
,	O
"	O
osu	B-Application
!	I-Application
catch	I-Application
"	O
,	O
and	O
"	O
osu	B-Application
!	I-Application
mania	I-Application
"	O
.	O
</s>
<s>
With	O
the	O
addition	O
of	O
osu	B-Application
!	I-Application
lazer	O
,	O
players	O
can	O
now	O
add	O
custom	O
gamemodes	O
to	O
the	O
osu	B-Application
!	I-Application
</s>
<s>
"	O
osu	B-Application
!	I-Application
standard	O
"	O
takes	O
direct	O
inspiration	O
from	O
Osu	B-Application
!	I-Application
</s>
<s>
This	O
is	O
the	O
flagship	O
gamemode	O
featured	O
on	O
the	O
osu	B-Application
!	I-Application
</s>
<s>
"	O
osu	B-Application
!	I-Application
mania	I-Application
"	O
is	O
a	O
vertical	O
scrolling	O
rhythm	O
game	O
that	O
mostly	O
takes	O
inspiration	O
from	O
Beatmania	B-Application
.	O
</s>
<s>
"	O
osu	B-Application
!	I-Application
taiko	I-Application
"	O
simulates	O
playing	O
on	O
taiko	O
and	O
is	O
based	O
on	O
Taiko	B-Application
no	I-Application
Tatsujin	I-Application
.	O
</s>
<s>
The	O
final	O
gamemode	O
,	O
osu	B-Application
!	I-Application
catch	I-Application
,	O
is	O
based	O
on	O
"	O
EZ2CATCH	O
"	O
,	O
which	O
was	O
part	O
of	O
the	O
EZ2DJ	B-Application
cabinet	O
.	O
</s>
<s>
The	O
game	O
can	O
be	O
played	O
using	O
various	O
peripherals	O
:	O
the	O
most	O
common	O
setup	O
is	O
a	O
graphics	B-Device
tablet	I-Device
or	O
computer	B-Device
mouse	I-Device
to	O
control	O
cursor	O
movement	O
,	O
paired	O
with	O
a	O
keyboard	B-Device
or	O
a	O
mini	O
keyboard	B-Device
with	O
only	O
two	O
keys	O
,	O
and	O
only	O
the	O
keyboard	B-Device
for	O
osu	B-Application
!	I-Application
taiko	I-Application
,	O
osu	B-Application
!	I-Application
catch	I-Application
,	O
and	O
osu	B-Application
!	I-Application
mania	I-Application
beatmaps	O
.	O
</s>
<s>
osu	B-Application
!	I-Application
</s>
<s>
The	O
biggest	O
unofficial	O
event	O
held	O
in	O
the	O
community	O
is	O
"	O
cavoe	O
's	O
osu	B-Application
!	I-Application
</s>
<s>
event	O
"	O
(	O
usually	O
referred	O
to	O
as	O
"	O
osu	B-Application
!	I-Application
</s>
<s>
osu	B-Application
!	I-Application
</s>
<s>
Since	O
established	O
in	O
2011	O
,	O
there	O
have	O
been	O
twelve	O
annual	O
osu	B-Application
!	I-Application
</s>
<s>
World	O
Cups	O
(	O
usually	O
abbreviated	O
as	O
OWC	O
)	O
,	O
one	O
for	O
each	O
game	O
mode	O
(	O
osu	B-Application
!	I-Application
mania	I-Application
having	O
two	O
for	O
four	O
key	O
and	O
seven	O
key	O
)	O
.	O
</s>
<s>
These	O
smaller	O
tournaments	O
comprise	O
the	O
vast	O
majority	O
of	O
all	O
osu	B-Application
!	I-Application
</s>
<s>
In	O
2011	O
,	O
osu	B-Application
!	I-Application
stream	O
was	O
released	O
as	O
an	O
adaptation	O
of	O
osu	B-Application
!	I-Application
</s>
<s>
for	O
iOS	B-Application
devices	O
running	O
iOS	B-Operating_System
6	I-Operating_System
and	O
later	O
,	O
also	O
developed	O
by	O
Dean	B-Application
Herbert	I-Application
.	O
</s>
<s>
The	O
main	O
difference	O
between	O
osu	B-Application
!	I-Application
</s>
<s>
On	O
12	O
January	O
2023	O
,	O
osu	O
!	O
stream	O
was	O
released	O
for	O
Android	B-Application
.	O
</s>
<s>
osu	B-Application
!	I-Application
droid	O
is	O
a	O
fanmade	O
client	O
that	O
is	O
unaffiliated	O
with	O
peppy	O
,	O
the	O
official	O
developer	O
of	O
osu	B-Application
!	I-Application
.	O
</s>
<s>
It	O
features	O
the	O
standard	O
osu	B-Application
!	I-Application
</s>
<s>
gamemode	O
and	O
is	O
only	O
available	O
on	O
the	O
Android	B-Application
platform	I-Application
.	O
</s>
<s>
osu	O
!	O
lazer	O
is	O
an	O
open	B-Application
source	I-Application
rewrite	O
of	O
the	O
original	O
game	O
client	O
.	O
</s>
<s>
The	O
development	O
of	O
osu	O
!	O
lazer	O
began	O
in	O
2015	O
,	O
and	O
is	O
currently	O
available	O
on	O
Microsoft	B-Application
Windows	I-Application
,	O
macOS	B-Application
,	O
Linux	B-Application
,	O
Android	B-Application
,	O
and	O
iOS	B-Application
.	O
</s>
<s>
osu	O
!	O
lazer	O
is	O
written	O
entirely	O
in	O
.NET	B-Application
(	O
formerly	O
.NET	B-Application
Core	I-Application
)	O
.	O
</s>
<s>
osu	O
!	O
framework	B-Architecture
is	O
an	O
open	B-Application
source	I-Application
game	O
framework	B-Architecture
developed	O
with	O
osu	O
!	O
lazer	O
in	O
mind	O
.	O
</s>
<s>
The	O
goal	O
of	O
osu	O
!	O
framework	B-Architecture
development	O
is	O
to	O
create	O
a	O
versatile	O
and	O
accessible	O
game	O
framework	B-Architecture
that	O
goes	O
further	O
than	O
most	O
,	O
providing	O
things	O
out-of-the-box	O
such	O
as	O
graphics	O
,	O
advanced	O
input	O
processing	O
,	O
and	O
text	O
rendering	O
.	O
</s>
<s>
Jeuxvideo.com	O
reviewed	O
osu	B-Application
!	I-Application
</s>
<s>
In	O
2010	O
,	O
MMOGames.com	O
reviewer	O
Daniel	O
Ball	O
said	O
that	O
while	O
the	O
game	O
was	O
very	O
similar	O
to	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
,	O
it	O
was	O
differentiated	O
by	O
its	O
community	O
's	O
large	O
library	O
of	O
high-quality	O
community	O
made	O
content	O
and	O
customization	O
.	O
</s>
