<s>
Rocketball	B-Application
is	O
a	O
sports-action	O
Commodore	O
64	O
computer	O
game	O
released	O
by	O
IJK	O
Software	O
in	O
1985	B-Application
.	O
</s>
<s>
Rocketball	B-Application
was	O
coded	O
by	O
John	O
Sinclair	O
and	O
has	O
music	O
by	O
L	O
Pilling	O
.	O
</s>
<s>
Rocketball	B-Application
is	O
based	O
on	O
the	O
futuristic	O
sports	O
movie	O
Rollerball	O
,	O
released	O
in	O
1975	O
,	O
starring	O
James	O
Caan	O
.	O
</s>
<s>
Rocketball'''s	O
taglines	O
were	O
,	O
"	O
The	O
rules	O
are	O
,	O
there	O
are	O
no	O
rules	O
"	O
,	O
and	O
"	O
This	O
was	O
never	O
meant	O
to	O
be	O
a	O
game.	O
"	O
</s>
<s>
Each	O
Rocketball	B-Application
team	O
has	O
five	O
active	O
players	O
on	O
roller	O
skates	O
.	O
</s>
<s>
The	O
four	O
Rocketball	B-Application
teams	O
are	O
Houston	O
(	O
wearing	O
blue	O
)	O
,	O
Tokyo	O
(	O
yellow	O
)	O
,	O
Moscow	O
(	O
burgundy	O
)	O
and	O
Madrid	O
(	O
Green	O
)	O
,	O
which	O
correspond	O
to	O
futuristic	O
city	O
states.Rocket	O
Ball	O
(	O
The	O
teams	O
Houston	O
,	O
Tokyo	O
and	O
Madrid	O
also	O
featured	O
in	O
the	O
Rollerball	O
film	O
.	O
)	O
</s>
