<s>
Retro/Grade	B-Application
is	O
a	O
video	O
game	O
developed	O
by	O
24	B-Application
Caret	I-Application
Games	I-Application
.	O
</s>
<s>
Players	O
control	O
a	O
spacecraft	O
,	O
like	O
many	O
classic	O
shooters	O
,	O
such	O
as	O
Aegis	B-Application
Wing	I-Application
,	O
but	O
the	O
entire	O
game	O
is	O
timed	O
to	O
music	O
,	O
similar	O
to	O
modern	O
rhythm	O
games	O
.	O
</s>
<s>
On	O
23	O
March	O
2013	O
,	O
Retro/Grade	B-Application
was	O
released	O
for	O
the	O
Windows	B-Application
PC	I-Application
via	O
Steam	B-Application
.	O
</s>
