<s>
The	O
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	O
series	O
was	O
developed	O
by	O
iNiS	O
Corporation	O
exclusively	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
system	O
and	O
published	O
by	O
Nintendo	O
.	O
</s>
<s>
It	O
consists	O
of	O
the	O
Japan-exclusive	O
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	O
duology	O
and	O
its	O
international	O
counterpart	O
,	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
,	O
which	O
contains	O
the	O
same	O
gameplay	O
but	O
had	O
its	O
characters	O
and	O
themes	O
adapted	O
to	O
fit	O
a	O
Western	O
audience	O
.	O
</s>
<s>
The	O
team	O
the	O
player	O
controls	O
,	O
which	O
is	O
an	O
ōendan	O
in	O
the	O
Ouendan	O
duology	O
or	O
a	O
squad	O
of	O
special	O
agents	O
in	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
,	O
always	O
consists	O
of	O
a	O
lead	O
dancer	O
flanked	O
by	O
two	O
backup	O
dancers	O
.	O
</s>
<s>
Each	O
mission	O
is	O
divided	O
into	O
multiple	O
phases	O
(	O
typically	O
four	O
)	O
and	O
involves	O
the	O
dance	O
team	O
performing	O
cool	O
moves	O
to	O
the	O
beat	O
and	O
rhythm	O
of	O
a	O
particular	O
song	O
,	O
which	O
must	O
be	O
done	O
successfully	O
by	O
performing	O
stylus	O
gestures	O
on	O
targets	O
displayed	O
on	O
a	O
beatmap	O
over	O
the	O
Nintendo	B-Device
DS	I-Device
 '	O
touch	B-Device
screen	I-Device
that	O
each	O
represent	O
a	O
beat	O
from	O
the	O
song	O
,	O
using	O
circles	O
that	O
shrink	O
over	O
the	O
targets	O
and	O
numerical	O
labels	O
on	O
most	O
of	O
them	O
as	O
guides	O
for	O
when	O
they	O
need	O
to	O
be	O
played	O
to	O
stay	O
in	O
sync	O
with	O
the	O
song	O
.	O
</s>
<s>
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	O
is	O
the	O
first	O
rhythm	O
game	O
developed	O
by	O
iNiS	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
,	O
released	O
in	O
2005	O
.	O
</s>
<s>
Following	O
the	O
success	O
of	O
Ouendan	O
,	O
iNiS	O
developed	O
an	O
spiritual	O
sequel	O
to	O
the	O
game	O
based	O
on	O
a	O
new	O
intellectual	O
property	O
that	O
caters	O
to	O
an	O
international	O
audience	O
,	O
releasing	O
it	O
in	O
2006	O
outside	O
of	O
Japan	O
as	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
.	O
</s>
<s>
Released	O
in	O
2007	O
in	O
lieu	O
of	O
a	O
Japanese	O
localization	O
of	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
,	O
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	B-Application
2	I-Application
is	O
a	O
sequel	O
to	O
the	O
original	O
Osu	B-Application
!	I-Application
</s>
<s>
Following	O
the	O
release	O
of	O
acclaimed	O
music	O
game	O
Gitaroo	B-Application
Man	I-Application
for	O
the	O
PlayStation	B-Device
2	I-Device
,	O
iNiS	O
founder	O
Keiichi	O
Yano	O
began	O
to	O
come	O
up	O
with	O
ideas	O
for	O
a	O
new	O
game	O
that	O
developed	O
substantially	O
upon	O
learning	O
about	O
the	O
Nintendo	B-Device
DS	I-Device
system	O
at	O
an	O
E3	O
and	O
understanding	O
how	O
a	O
rhythm	O
game	O
could	O
be	O
tailored	O
for	O
it	O
.	O
</s>
<s>
Combining	O
this	O
knowledge	O
with	O
his	O
adoption	O
of	O
the	O
invigorating	O
mentality	O
of	O
ōendan	O
to	O
improve	O
his	O
company	O
's	O
flagging	O
morale	O
after	O
Gitaroos	B-Application
unexpected	O
commercial	O
failure	O
,	O
his	O
development	O
team	O
then	O
put	O
together	O
what	O
would	O
become	O
Osu	B-Application
!	I-Application
</s>
<s>
This	O
new	O
DS-exclusive	O
rhythm	O
game	O
drew	O
interest	O
from	O
Nintendo	O
,	O
which	O
agreed	O
to	O
publish	O
the	O
game	O
.	O
</s>
<s>
The	O
resulting	O
product	O
,	O
which	O
replaced	O
the	O
ōendan	O
with	O
a	O
team	O
of	O
special	O
agents	O
helping	O
people	O
around	O
the	O
world	O
,	O
was	O
a	O
spiritual	O
sequel	O
titled	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
and	O
released	O
in	O
2006	O
outside	O
of	O
Japan	O
,	O
receiving	O
critical	O
acclaim	O
,	O
winning	O
several	O
awards	O
,	O
and	O
even	O
drawing	O
the	O
interest	O
of	O
Japanese	O
import	O
gamers	O
.	O
</s>
<s>
Osu	B-Application
!	I-Application
</s>
<s>
Ouendan	B-Application
2	I-Application
.	O
</s>
<s>
Following	O
its	O
release	O
,	O
Nintendo	O
offered	O
limited-time	O
downloadable	B-Protocol
content	I-Protocol
for	O
Ouendan	B-Application
2	I-Application
from	O
DS	B-Device
Download	I-Device
Stations	I-Device
that	O
added	O
character	O
skins	O
and	O
multiplayer	O
characters	O
from	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
.	O
</s>
<s>
During	O
the	O
life	O
cycle	O
of	O
the	O
DS	B-Device
 '	O
successor	O
,	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
,	O
iNiS	O
asked	O
Nintendo	O
if	O
a	O
third	O
Ouendan	O
game	O
could	O
be	O
made	O
on	O
the	O
platform	O
,	O
but	O
the	O
publisher	O
declined	O
to	O
move	O
ahead	O
with	O
it	O
due	O
to	O
business	O
reasons	O
.	O
</s>
<s>
Yano	O
also	O
expressed	O
interest	O
in	O
making	O
a	O
sequel	O
to	O
Elite	B-Application
Beat	I-Application
Agents	I-Application
in	O
an	O
interview	O
one	O
decade	O
after	O
its	O
release	O
,	O
but	O
remarked	O
that	O
it	O
could	O
only	O
happen	O
if	O
Nintendo	O
had	O
another	O
system	O
like	O
the	O
DS	B-Device
that	O
would	O
suit	O
its	O
unique	O
design	O
.	O
</s>
<s>
iNiS	O
 '	O
three	O
rhythm	O
games	O
for	O
the	O
DS	B-Device
inspired	O
a	O
new	O
fangame	B-Application
for	O
personal	B-Device
computers	I-Device
,	O
titled	O
osu	B-Application
!	I-Application
</s>
<s>
and	O
released	O
months	O
after	O
Ouendan	B-Application
2	I-Application
.	O
</s>
<s>
The	O
characters	O
in	O
all	O
three	O
games	O
also	O
received	O
minor	O
representation	O
in	O
two	O
installments	O
of	O
the	O
Super	B-Application
Smash	I-Application
Bros	I-Application
.	I-Application
fighting	O
game	O
series	O
.	O
</s>
<s>
The	O
three	O
games	O
also	O
inspired	O
the	O
gameplay	O
of	O
few	O
other	O
DS	B-Device
rhythm	O
games	O
,	O
namely	O
the	O
DS	B-Device
versions	O
of	O
Happy	B-Application
Feet	I-Application
and	O
Michael	B-Application
Jackson	I-Application
:	I-Application
The	I-Application
Experience	I-Application
,	O
as	O
well	O
as	O
Looney	O
Tunes	O
:	O
Cartoon	O
Conductor''	O
.	O
</s>
