<s>
Naval	B-Application
Ops	I-Application
:	I-Application
Warship	I-Application
Gunner	I-Application
2	I-Application
,	O
released	O
in	O
Japan	O
as	O
is	O
a	O
2006	O
vehicle	O
simulation	O
game	O
that	O
was	O
released	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
Warship	B-Application
Gunner	I-Application
2	I-Application
is	O
the	O
direct	O
sequel	O
to	O
Naval	B-Application
Ops	I-Application
:	I-Application
Warship	I-Application
Gunner	I-Application
from	O
Koei	O
that	O
debuted	O
in	O
2003	O
,	O
a	O
subseries	O
alongside	O
the	O
Warship	B-Device
Commander	I-Device
subseries	O
within	O
the	O
overall	O
Kurogane	O
no	O
Houkou	O
series	O
.	O
</s>
<s>
In	O
2009	O
,	O
it	O
was	O
ported	O
to	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
as	O
,	O
released	O
only	O
in	O
Japan	O
.	O
</s>
