<s>
R-Type	B-Application
is	O
a	O
science-fiction	O
horizontal-scrolling	O
shooter	O
video	O
game	O
franchise	O
developed	O
and	O
published	O
by	O
Irem	O
for	O
arcade	O
systems	O
and	O
home	O
game	O
platforms	O
.	O
</s>
<s>
The	O
first	O
entry	O
in	O
the	O
series	O
was	O
released	O
in	O
1987	O
,	O
R-Type	B-Application
,	O
followed	O
by	O
several	O
sequels	O
for	O
other	O
platforms	O
.	O
</s>
<s>
The	O
series	O
centers	O
on	O
an	O
intergalactic	O
war	O
between	O
humans	O
and	O
the	O
Bydo	B-Application
,	O
a	O
powerful	O
extraterrestrial	O
race	O
that	O
are	O
made	O
from	O
both	O
biological	O
lifeforms	O
and	O
mechanical	O
structures	O
.	O
</s>
<s>
R-Type	B-Application
video	O
games	O
have	O
been	O
released	O
for	O
multiple	O
home	O
video	O
game	O
consoles	O
,	O
as	O
well	O
as	O
personal	B-Device
computers	I-Device
,	O
handheld	O
systems	O
and	O
mobile	O
phones	O
.	O
</s>
<s>
Several	O
games	O
in	O
the	O
series	O
were	O
also	O
released	O
for	O
digital	O
distribution	O
services	O
,	O
such	O
as	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
,	O
alongside	O
dedicated	O
compilation	O
games	O
for	O
other	O
systems	O
.	O
</s>
<s>
The	O
R-Type	B-Application
series	O
is	O
considered	O
one	O
of	O
the	O
most	O
important	O
video	O
game	O
franchises	O
established	O
in	O
the	O
1980s	O
;	O
the	O
original	O
is	O
also	O
cited	O
as	O
one	O
of	O
the	O
greatest	O
video	O
games	O
ever	O
made	O
.	O
</s>
