<s>
Heavy	B-Operating_System
Weapon	I-Operating_System
(	O
or	O
Heavy	B-Operating_System
Weapon	I-Operating_System
:	I-Operating_System
Atomic	I-Operating_System
Tank	I-Operating_System
)	O
is	O
a	O
horizontally	O
scrolling	O
shooter	O
developed	O
and	O
published	O
by	O
PopCap	O
Games	O
and	O
released	O
in	O
2005	O
.	O
</s>
<s>
In	O
Heavy	B-Operating_System
Weapon	I-Operating_System
,	O
the	O
player	O
guides	O
a	O
powerful	O
atomic	O
tank	O
through	O
several	O
stages	O
of	O
opposing	O
enemy	O
forces	O
in	O
Cold	O
War	O
.	O
</s>
<s>
In	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
and	O
PS3	B-Operating_System
versions	O
of	O
the	O
game	O
,	O
the	O
player	O
may	O
either	O
choose	O
to	O
survive	O
by	O
themselves	O
,	O
or	O
join	O
a	O
War	O
Party	O
survival	O
game	O
where	O
up	O
to	O
four	O
players	O
can	O
join	O
.	O
</s>
