<s>
Pachi-Slot	O
Sengen	O
is	O
a	O
series	O
of	O
pachi-slot	O
(	O
Japanese	O
slot	O
machine	O
)	O
simulation	O
games	O
from	O
Tecmo	O
primarily	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
While	O
early	O
games	O
in	O
the	O
series	O
featured	O
several	O
of	O
Tecmo	O
's	O
real-life	O
gambling	O
machines	O
,	O
the	O
fifth	O
and	O
sixth	O
games	O
focused	O
on	O
the	O
Rio	O
line	O
of	O
machines	O
,	O
as	O
well	O
as	O
their	O
star	O
,	O
Rio	O
Rollins	O
Tachibana	O
,	O
a	O
character	O
who	O
later	O
appeared	O
in	O
the	O
2010	O
Dead	B-Application
or	I-Application
Alive	I-Application
Paradise	I-Application
game	O
,	O
starred	O
in	O
the	O
2011	O
anime	O
television	O
series	O
Rio	O
:	O
Rainbow	O
Gate	O
!,	O
and	O
appeared	O
playable	O
in	O
the	O
2017	O
action	O
game	O
Warriors	B-Application
All-Stars	I-Application
.	O
</s>
