<s>
is	O
a	O
2000	O
puzzle	O
video	O
game	O
compilation	O
developed	O
by	O
Compile	O
for	O
the	O
PlayStation	B-Device
.	O
</s>
<s>
It	O
is	O
Compile	O
's	O
last	O
Puyo	B-Application
Puyo	I-Application
game	O
before	O
Sega	O
,	O
previously	O
only	O
owning	O
the	O
character	O
rights	O
,	O
fully	O
obtained	O
the	O
rights	O
to	O
the	O
series	O
.	O
</s>
<s>
Puyo	B-Application
Puyo	I-Application
Box	I-Application
,	O
being	O
a	O
compilation	O
,	O
primarily	O
consists	O
of	O
earlier	O
Puyo	B-Application
Puyo	I-Application
games	O
,	O
but	O
also	O
contains	O
original	O
content	O
.	O
</s>
<s>
Puyo	B-Application
Puyo	I-Application
Box	I-Application
has	O
several	O
game	O
modes	O
.	O
</s>
<s>
It	O
consists	O
of	O
the	O
Sega	B-Operating_System
Mega	I-Operating_System
Drive	I-Operating_System
(	O
Genesis	B-Operating_System
in	O
the	O
US	O
)	O
versions	O
of	O
Puyo	B-Application
Puyo	I-Application
and	O
Puyo	B-Application
Puyo	I-Application
Tsu	I-Application
,	O
as	O
well	O
as	O
a	O
Madō	O
Monogatari-style	O
quest	O
mode	O
in	O
which	O
the	O
player	O
plays	O
as	O
Arle	O
Nadja	O
and	O
battles	O
against	O
members	O
of	O
the	O
other	O
cast	O
in	O
Puyo	B-Application
Puyo	I-Application
matches	O
.	O
</s>
<s>
The	O
key	O
point	O
in	O
the	O
gameplay	O
of	O
Puyo	B-Application
Puyo	I-Application
BOX	I-Application
is	O
that	O
the	O
player	O
can	O
choose	O
a	O
ruleset	O
from	O
either	O
Puyo	B-Application
Puyo	I-Application
,	O
Puyo	B-Application
Puyo	I-Application
Tsu	I-Application
(	O
with	O
countering	O
)	O
,	O
Puyo	B-Application
Puyo	I-Application
Sun	I-Application
(	O
with	O
countering	O
and	O
Sun	O
Puyos	O
dropping	O
after	O
each	O
counter	O
)	O
,	O
and	O
Puyo	B-Application
Puyo	I-Application
~	I-Application
n	I-Application
(	O
with	O
countering	O
and	O
a	O
special	O
gauge	O
,	O
with	O
a	O
select	O
number	O
of	O
specials	O
for	O
the	O
player	O
to	O
choose	O
before	O
a	O
game	O
begins	O
)	O
.	O
</s>
<s>
One	O
of	O
the	O
special	O
multiplayer	O
modes	O
made	O
available	O
in	O
this	O
game	O
,	O
known	O
as	O
Treasure	O
Mode	O
,	O
was	O
later	O
adapted	O
in	O
Puyo	B-Application
Puyo	I-Application
!	O
</s>
