<s>
Dropchord	B-Application
is	O
a	O
motion	O
controlled	O
music-based	O
puzzle	O
video	O
game	O
for	O
Windows	B-Application
and	O
OS	B-Operating_System
X	I-Operating_System
using	O
the	O
Leap	B-General_Concept
Motion	I-General_Concept
controller	I-General_Concept
.	O
</s>
<s>
The	O
game	O
was	O
one	O
of	O
the	O
first	O
games	O
released	O
on	O
Leap	B-General_Concept
Motion	I-General_Concept
's	O
Airspace	O
app	O
store	O
,	O
when	O
it	O
went	O
live	O
on	O
July	O
22	O
,	O
2013	O
.	O
</s>
<s>
It	O
was	O
also	O
released	O
for	O
Ouya	B-Application
on	O
July	O
31	O
,	O
2013	O
,	O
and	O
on	O
Android	B-Application
and	O
iOS	B-Application
on	O
August	O
1	O
,	O
2013	O
.	O
</s>
<s>
Dropchord	B-Application
is	O
a	O
motion	O
controlled	O
music-based	O
puzzle	O
video	O
game	O
using	O
the	O
Leap	B-General_Concept
Motion	I-General_Concept
controller	I-General_Concept
.	O
</s>
<s>
Dropchord	B-Application
was	O
principally	O
designed	O
and	O
developed	O
by	O
Double	O
Fine	O
's	O
Patrick	O
Hackett	O
and	O
Drew	O
Skillman	O
,	O
who	O
previously	O
worked	O
together	O
on	O
Kinect	B-Application
Party	I-Application
.	O
</s>
<s>
It	O
was	O
originally	O
titled	O
Radius	O
,	O
but	O
was	O
retitled	O
Dropchord	B-Application
before	O
its	O
premiere	O
at	O
PAX	O
East	O
2013	O
.	O
</s>
<s>
The	O
iOS	B-Application
version	O
received	O
above-average	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
