<s>
is	O
a	O
1988	O
computer	O
game	O
,	O
developed	O
and	O
published	O
by	O
Konami	O
exclusively	O
for	O
the	O
MSX	B-Operating_System
platform	O
in	O
1988	O
.	O
</s>
<s>
The	O
game	O
is	O
part	O
of	O
the	O
long	O
running	O
Gradius	B-Application
series	O
of	O
side-scrolling	O
shooters	O
and	O
is	O
a	O
spin-off	O
of	O
Gradius	B-Application
II	I-Application
:	I-Application
Gofer	I-Application
no	I-Application
Yabou	I-Application
.	O
</s>
<s>
It	O
is	O
the	O
second	O
game	O
of	O
the	O
series	O
to	O
be	O
released	O
exclusively	O
for	O
the	O
MSX	B-Operating_System
after	O
Nemesis	B-Application
2	I-Application
.	O
</s>
<s>
In	O
terms	O
of	O
the	O
story	O
;	O
the	O
game	O
is	O
a	O
sequel	O
to	O
Gradius	B-Application
II	I-Application
,	O
Nemesis	B-Application
2	I-Application
,	O
and	O
the	O
MSX	B-Operating_System
conversion	O
of	O
Salamander	B-Application
.	O
</s>
<s>
The	O
Vic	O
Viper	O
is	O
replaced	O
by	O
a	O
new	O
ship	O
called	O
the	O
Vixen	O
(	O
4	O
classes	O
)	O
;	O
piloted	O
by	O
David	O
Burton	O
,	O
a	O
direct	O
descendant	O
of	O
James	O
who	O
is	O
assisted	O
by	O
his	O
AI	B-Application
Gaudie	O
.	O
</s>
<s>
The	O
third	O
one	O
is	O
more	O
like	O
Metalion	O
from	O
Nemesis	B-Application
2	I-Application
,	O
featuring	O
"	O
Napalm	O
Missile	O
"	O
and	O
(	O
Extended	O
)	O
"	O
Fire	O
Blaster	O
"	O
.	O
</s>
<s>
The	O
fourth	O
one	O
is	O
more	O
like	O
the	O
Sabel	O
Tiger	O
from	O
Salamander	B-Application
,	O
featuring	O
the	O
2-way	O
missile	O
approach	O
and	O
"	O
Ripple	O
Laser	O
"	O
.	O
</s>
<s>
It	O
is	O
also	O
possible	O
to	O
choose	O
the	O
behavior	O
of	O
"	O
Option	O
"	O
,	O
from	O
the	O
original	O
shadow	O
movement	O
,	O
"	O
Fixed	O
"	O
and	O
"	O
Rolling	O
"	O
,	O
like	O
the	O
"	O
Option	O
Warrior	O
"	O
from	O
Nemesis	B-Application
2	I-Application
.	O
</s>
<s>
The	O
game	O
retains	O
several	O
of	O
the	O
new	O
weapons	O
introduced	O
in	O
Nemesis	B-Application
2	I-Application
like	O
"	O
Up	O
Laser	O
"	O
,	O
"	O
Fire	O
Blaster	O
"	O
and	O
"	O
Vector	O
Laser	O
"	O
as	O
well	O
as	O
Salamander	B-Application
weapons	O
like	O
"	O
Meteor	O
Laser	O
"	O
and	O
"	O
Screw	O
Laser	O
"	O
.	O
</s>
<s>
This	O
is	O
the	O
only	O
game	O
in	O
the	O
Nemesis	B-Application
series	O
which	O
visibly	O
keeps	O
track	O
of	O
the	O
number	O
of	O
speed	O
boosts	O
.	O
</s>
<s>
In	O
order	O
to	O
upgrade	O
the	O
ship	O
's	O
weapons	O
,	O
secret	O
spots	O
must	O
be	O
found	O
,	O
just	O
like	O
the	O
secret	O
stages	O
in	O
Nemesis	B-Application
2	I-Application
and	O
the	O
predictions	O
in	O
Salamander	B-Application
.	O
</s>
