<s>
is	O
a	O
horizontally	O
scrolling	O
shooter	O
developed	O
and	O
published	O
in	O
1989	O
by	O
Konami	O
for	O
the	O
MSX2	B-Operating_System
and	O
MSX2+	B-Operating_System
home	O
computers	O
.	O
</s>
<s>
It	O
was	O
re-released	O
for	O
mobile	O
phones	O
on	O
September	O
1	O
,	O
2006	O
;	O
for	O
the	B-Operating_System
Nintendo	I-Operating_System
Wii	I-Operating_System
's	O
Virtual	B-Application
Console	I-Application
service	O
on	O
November	O
24	O
,	O
2009	O
;	O
on	O
February	O
19	O
,	O
2014	O
,	O
for	O
the	B-Operating_System
Wii	I-Operating_System
U	O
;	O
and	O
on	O
July	O
28	O
,	O
2015	O
,	O
for	O
the	O
Windows	O
Store	O
(	O
Project	O
EGG	O
)	O
.	O
</s>
<s>
The	O
weapons	O
gradually	O
lose	O
power	O
unless	O
the	O
player	O
makes	O
additional	O
pickups	O
,	O
but	O
the	O
ship	O
is	O
helped	O
by	O
two	O
stationary	O
"	O
options	O
"	O
similar	O
to	O
those	O
found	O
in	O
the	O
Gradius	B-Application
series	O
.	O
</s>
