<s>
is	O
a	O
1989	O
vertically	O
scrolling	O
shooter	O
arcade	B-Application
video	I-Application
game	I-Application
developed	O
and	O
published	O
by	O
Taito	O
in	O
Japan	O
.	O
</s>
<s>
A	O
port	O
to	O
the	O
Sega	B-Operating_System
Mega	I-Operating_System
Drive	I-Operating_System
was	O
released	O
in	O
1990	O
.	O
</s>
<s>
Game	O
Machine	O
listed	O
Master	B-Application
of	I-Application
Weapon	I-Application
as	O
being	O
among	O
the	O
most	O
popular	O
arcade	B-Application
games	O
in	O
Japan	O
of	O
June	O
1989	O
.	O
</s>
