<s>
Additionally	O
,	O
crates	O
may	O
contain	O
orbs	O
or	O
one	O
of	O
the	O
six	O
pieces	O
of	O
the	O
Heavy	B-Application
Barrel	I-Application
superweapon	O
.	O
</s>
<s>
Like	O
SNK	O
's	O
Ikari	B-Application
Warriors	I-Application
,	O
the	O
original	O
arcade	O
version	O
featured	O
8-way	O
rotary	O
joysticks	O
.	O
</s>
<s>
The	O
Heavy	B-Application
Barrel	I-Application
is	O
found	O
in	O
six	O
pieces	O
and	O
is	O
an	O
energy	O
cannon	O
capable	O
of	O
destroying	O
any	O
enemy	O
in	O
the	O
game	O
with	O
a	O
single	O
shot	O
(	O
except	O
the	O
final	O
enemy	O
,	O
and	O
possibly	O
one	O
other	O
boss	O
that	O
may	O
have	O
required	O
two	O
shots	O
)	O
.	O
</s>
<s>
The	O
Heavy	B-Application
Barrel	I-Application
is	O
best	O
used	O
to	O
get	O
past	O
tough	O
bosses	O
,	O
and	O
the	O
game	O
only	O
contains	O
enough	O
pieces	O
to	O
allow	O
the	O
weapon	O
to	O
be	O
built	O
three	O
times	O
in	O
a	O
single	O
game	O
.	O
</s>
<s>
In	O
a	O
two-player	O
game	O
,	O
whoever	O
collects	O
the	O
sixth	O
piece	O
is	O
equipped	O
with	O
the	O
Heavy	B-Application
Barrel	I-Application
.	O
</s>
<s>
Heavy	B-Application
Barrel	I-Application
was	O
ported	O
by	O
Quicksilver	O
Software	O
to	O
the	O
Apple	B-Device
II	I-Device
and	O
DOS	B-Device
in	O
1989	O
.	O
</s>
<s>
All	O
versions	O
of	O
Heavy	B-Application
Barrel	I-Application
were	O
published	O
by	O
Data	O
East	O
.	O
</s>
<s>
In	O
1989	O
,	O
Heavy	B-Application
Barrel	I-Application
was	O
contracted	O
to	O
be	O
ported	O
to	O
the	O
Commodore	O
64	O
by	O
F.A.C.S.	O
</s>
<s>
(	O
Financial	O
Accounting	O
and	O
Computing	O
Software	O
)	O
,	O
a	O
West	O
Bloomfield	O
Township	O
,	O
Michigan	B-Device
company	O
.	O
</s>
<s>
In	O
February	O
2010	O
,	O
Majesco	O
Entertainment	O
released	O
a	O
port	O
of	O
Heavy	B-Application
Barrel	I-Application
for	O
the	B-Operating_System
Wii	I-Operating_System
(	O
as	O
part	O
of	O
the	O
Data	B-Application
East	I-Application
Arcade	I-Application
Classics	I-Application
disc	O
)	O
and	O
for	O
the	O
Zeebo	B-Device
.	O
</s>
<s>
In	O
Japan	O
,	O
Game	O
Machine	O
listed	O
Heavy	B-Application
Barrel	I-Application
on	O
their	O
January	O
15	O
,	O
1988	O
issue	O
as	O
being	O
the	O
sixth	O
most-successful	O
table	O
arcade	O
unit	O
of	O
the	O
month	O
.	O
</s>
