<s>
is	O
a	O
puzzle	O
video	O
game	O
of	O
the	O
Puyo	B-Application
Puyo	I-Application
series	O
,	O
developed	O
by	O
Sonic	O
Team	O
and	O
published	O
by	O
Sega	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
in	O
2006	O
,	O
as	O
well	O
as	O
PlayStation	B-Device
2	I-Device
,	O
PlayStation	B-Operating_System
Portable	I-Operating_System
,	O
and	O
Wii	B-Operating_System
in	O
2007	O
.	O
</s>
<s>
This	O
is	O
the	O
first	O
Puyo	B-Application
Puyo	I-Application
game	O
to	O
be	O
released	O
on	O
the	B-Operating_System
Wii	I-Operating_System
console	O
.	O
</s>
<s>
It	O
turns	O
out	O
that	O
the	O
comets	O
are	O
actually	O
six	O
characters	O
from	O
the	O
Madou	B-Application
Monogatari	I-Application
series	O
,	O
who	O
serve	O
as	O
boss	O
characters	O
in	O
the	O
story	O
modes	O
.	O
</s>
<s>
As	O
Puyo	B-Application
Puyo	I-Application
!	O
</s>
<s>
15th	O
Anniversary	O
was	O
created	O
to	O
commemorate	O
the	O
fifteenth	O
anniversary	O
of	O
Puyo	B-Application
Puyo	I-Application
,	O
it	O
includes	O
most	O
of	O
the	O
Fever	O
characters	O
,	O
plus	O
six	O
characters	O
originating	O
from	O
the	O
Madou	B-Application
Monogatari	I-Application
series	O
.	O
</s>
<s>
Puyo	B-Application
Puyo	I-Application
!	O
</s>
<s>
15th	O
Anniversary	O
has	O
a	O
slew	O
of	O
new	O
modes	O
,	O
and	O
also	O
includes	O
modes	O
that	O
emulate	O
the	O
original	O
Puyo	B-Application
Puyo	I-Application
,	O
Puyo	B-Application
Puyo	I-Application
Tsu	I-Application
and	O
Puyo	B-Application
Pop	I-Application
Fever	I-Application
.	O
</s>
<s>
This	O
mode	O
emulates	O
the	O
gameplay	O
of	O
the	O
original	O
Puyo	B-Application
Puyo	I-Application
.	O
</s>
<s>
This	O
mode	O
emulates	O
the	O
gameplay	O
of	O
Puyo	B-Application
Puyo	I-Application
Tsu	I-Application
.	O
</s>
<s>
Similar	O
to	O
the	O
gameplay	O
of	O
Puyo	B-Application
Pop	I-Application
Fever	I-Application
and	O
its	O
sequel	O
,	O
but	O
with	O
some	O
small	O
changes	O
.	O
</s>
<s>
The	O
Nintendo	B-Device
DS	I-Device
version	O
of	O
15th	O
Anniversary	O
supports	O
both	O
local	O
and	O
online	O
multiplayer	O
.	O
</s>
<s>
In	O
this	O
mode	O
,	O
players	O
without	O
a	O
copy	O
of	O
15th	O
Anniversary	O
can	O
play	O
along	O
with	O
those	O
that	O
do	O
,	O
using	O
DS	B-Device
Download	O
Play	O
.	O
</s>
<s>
Puyo	B-Application
Puyo	I-Application
,	O
Puyo	B-Application
Puyo	I-Application
Tsu	I-Application
,	O
and	O
Puyo	B-Application
Puyo	I-Application
Fever	I-Application
modes	O
support	O
up	O
to	O
eight	O
players	O
.	O
</s>
<s>
In	O
this	O
mode	O
,	O
players	O
could	O
use	O
Nintendo	B-Application
Wi-Fi	I-Application
Connection	I-Application
to	O
play	O
across	O
the	O
internet	O
.	O
</s>
<s>
Wi-Fi	O
mode	O
supported	O
only	O
3	O
modes	O
(	O
Puyo	B-Application
Puyo	I-Application
,	O
Puyo	B-Application
Puyo	I-Application
2	I-Application
,	O
and	O
Puyo	B-Application
Puyo	I-Application
Fever	I-Application
)	O
.	O
</s>
<s>
When	O
playing	O
random	O
games	O
,	O
three-player	O
mode	O
and	O
the	O
original	O
Puyo	B-Application
Puyo	I-Application
rules	O
were	O
not	O
available	O
.	O
</s>
<s>
Puyo	B-Application
Puyo	I-Application
!	O
</s>
<s>
15th	O
Anniversary	O
for	O
the	O
DS	B-Device
had	O
several	O
issues	O
.	O
</s>
<s>
In	O
the	O
original	O
and	O
1.1	O
versions	O
of	O
the	O
DS	B-Device
game	O
,	O
both	O
players	O
lost	O
points	O
when	O
one	O
disconnected	O
from	O
a	O
Wi-Fi	O
match	O
.	O
</s>
<s>
This	O
bug	O
can	O
also	O
be	O
seen	O
in	O
version	O
2.00	O
of	O
the	O
PC	O
version	O
of	O
Puyo	B-Application
Pop	I-Application
Fever	I-Application
.	O
</s>
<s>
This	O
symbol	O
has	O
been	O
used	O
in	O
all	O
subsequent	O
Puyo	B-Application
Puyo	I-Application
games	O
.	O
</s>
