<s>
is	O
a	O
strategy	O
role-playing	O
video	O
game	O
for	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
.	O
</s>
<s>
The	O
game	O
plays	O
very	O
differently	O
from	O
past	O
games	O
in	O
the	O
Generation	B-Application
of	I-Application
Chaos	I-Application
series	O
,	O
which	O
contained	O
large	O
scale	O
battles	O
in	O
the	O
vein	O
of	O
Dragon	B-Application
Force	I-Application
.	O
</s>
<s>
Instead	O
,	O
the	O
game	O
's	O
controls	O
and	O
art	O
style	O
resembles	O
former	O
titles	O
of	O
developer	O
Sting	O
Entertainment	O
,	O
namely	O
Yggdra	B-Application
Union	I-Application
and	O
Knights	B-Application
in	I-Application
the	I-Application
Nightmare	I-Application
.	O
</s>
<s>
The	O
game	O
has	O
a	O
battle	O
system	O
called	O
the	O
"	O
Attack	O
Chance	O
"	O
,	O
where	O
bonus	O
damage	O
could	O
be	O
given	O
upon	O
hitting	O
buttons	O
in	O
time	O
with	O
on-screen	O
cues	O
,	O
similar	O
to	O
games	O
in	O
the	O
music/rhythm	B-Application
genre	I-Application
.	O
</s>
<s>
The	O
game	O
takes	O
place	O
in	O
the	O
dark	O
,	O
barren	O
world	O
of	O
Hades	B-Language
,	O
revolving	O
around	O
a	O
boy	O
named	O
Claude	O
,	O
and	O
his	O
sister	O
named	O
Yuri	O
.	O
</s>
<s>
The	O
game	O
was	O
announced	O
as	O
a	O
joint	O
venture	O
between	O
Idea	O
Factory	O
,	O
the	O
company	O
that	O
had	O
made	O
the	O
previous	O
games	O
in	O
the	O
Generation	B-Application
of	I-Application
Chaos	I-Application
series	O
,	O
and	O
Sting	O
,	O
developer	O
of	O
games	O
such	O
as	O
Riviera	B-Application
:	I-Application
The	I-Application
Promised	I-Application
Land	I-Application
,	O
Knights	B-Application
in	I-Application
the	I-Application
Nightmare	I-Application
,	O
and	O
Gungnir	B-Application
.	O
</s>
