<s>
Planet	B-Application
Hot	I-Application
Wheels	I-Application
was	O
a	O
massively	O
multiplayer	O
online	O
racing	O
game	O
created	O
by	O
the	O
developers	O
of	O
the	O
toy	O
car	O
brand	O
Hot	B-Device
Wheels	I-Device
and	O
Mattel	O
,	O
Hot	B-Device
Wheels	I-Device
 '	O
parent	O
company	O
.	O
</s>
<s>
The	O
virtual	O
racing	O
game	O
included	O
story	O
features	O
based	O
on	O
the	O
film	O
Hot	B-Device
Wheels	I-Device
World	I-Device
Race	I-Device
,	O
and	O
used	O
representations	O
of	O
real	O
world	O
Hot	B-Device
Wheels	I-Device
models	O
.	O
</s>
<s>
Users	O
could	O
race	O
and	O
play	O
mini-games	O
to	O
earn	O
credits	O
,	O
the	O
currency	O
of	O
Planet	B-Application
Hot	I-Application
Wheels	I-Application
,	O
and	O
use	O
them	O
to	O
purchase	O
items	O
and	O
cars	O
.	O
</s>
<s>
Players	O
could	O
also	O
buy	O
specially	O
marked	O
Hot	B-Device
Wheels	I-Device
cars	O
that	O
came	O
with	O
a	O
code	O
;	O
entering	O
the	O
code	O
in	O
the	O
game	O
would	O
unlock	O
that	O
car	O
model	O
in	O
the	O
game	O
,	O
or	O
upgrades	O
in	O
the	O
form	O
of	O
items	O
such	O
as	O
decals	O
,	O
paint	O
jobs	O
,	O
weapons	O
,	O
and	O
other	O
components	O
.	O
</s>
<s>
Planet	B-Application
Hot	I-Application
Wheels	I-Application
was	O
heavily	O
advertised	O
in	O
its	O
first	O
two	O
years	O
.	O
</s>
<s>
Mattel	O
released	O
six	O
"	O
energy	O
"	O
branded	O
cars	O
,	O
based	O
on	O
the	O
six	O
weapon	O
energy	O
types	O
usable	O
in	O
the	O
main	O
game	O
types	O
of	O
Planet	B-Application
Hot	I-Application
Wheels	I-Application
(	O
Electrical	O
,	O
Cyber	O
,	O
Particle	O
,	O
Protonic	O
,	O
Geothermal	O
,	O
and	O
Chemical	O
)	O
that	O
each	O
came	O
with	O
a	O
CD	O
and	O
a	O
level	O
from	O
Stunt	O
Track	O
Driver	O
2	O
for	O
each	O
CD	O
collected	O
.	O
</s>
<s>
The	O
popular	O
Hot	B-Device
Wheels	I-Device
World	I-Device
Race	I-Device
subseries	O
was	O
integrated	O
into	O
Planet	B-Application
Hot	I-Application
Wheels	I-Application
through	O
adding	O
the	O
cars	O
featured	O
in	O
the	O
movie	O
,	O
and	O
later	O
in	O
2003	O
,	O
a	O
revamped	O
version	O
of	O
the	O
services	O
main	O
"	O
Head-to-Head	O
"	O
and	O
"	O
Full-on	O
Rally	O
"	O
racing	O
mode	O
was	O
released	O
,	O
featuring	O
tracks	O
inspired	O
by	O
the	O
movie	O
.	O
</s>
