<s>
Karous	B-Application
( カラス	O
,	O
karasu	O
,	O
"	O
raven	O
"	O
)	O
is	O
a	O
vertical-scrolling	O
shooter	O
video	O
game	O
developed	O
by	O
Milestone	O
Inc	O
.	O
for	O
the	O
Sega	O
NAOMI	O
platform	O
and	O
released	O
in	O
Japanese	O
arcades	O
on	O
November	O
15	O
,	O
2006	O
.	O
</s>
<s>
The	O
game	O
was	O
later	O
ported	O
to	O
the	O
Sega	B-Operating_System
Dreamcast	I-Operating_System
,	O
becoming	O
the	O
system	O
's	O
last	O
officially	O
licensed	O
title	O
when	O
it	O
was	O
released	O
in	O
Japan	O
on	O
March	O
8	O
,	O
2007	O
.	O
</s>
<s>
The	O
weapon	O
system	O
is	O
based	O
on	O
Radio	B-Application
Allergy	I-Application
,	O
but	O
it	O
uses	O
a	O
unique	O
D.F.S.	O
</s>
<s>
On	O
April	O
8	O
,	O
2008	O
,	O
a	O
Nintendo	B-Operating_System
Wii	I-Operating_System
version	O
of	O
the	O
game	O
was	O
released	O
in	O
Japan	O
,	O
titled	O
Milestone	B-Application
Shooting	I-Application
Collection	I-Application
:	I-Application
Karous	I-Application
Wii	I-Application
.	O
</s>
<s>
The	O
collection	O
includes	O
both	O
Radirgy	B-Application
and	O
Chaos	B-Application
Field	I-Application
as	O
extras	O
.	O
</s>
<s>
Famitsu	O
gave	O
the	B-Operating_System
Dreamcast	I-Operating_System
version	O
a	O
review	O
of	O
6	O
,	O
6	O
,	O
6	O
,	O
7	O
,	O
while	O
Edge	O
gave	O
it	O
6	O
out	O
of	O
10	O
.	O
</s>
<s>
The	O
game	O
marks	O
the	O
last	O
official	O
third-party	O
release	O
for	O
the	B-Operating_System
Dreamcast	I-Operating_System
platform	O
.	O
</s>
