<s>
Area	B-Application
51	I-Application
:	I-Application
Site	I-Application
4	I-Application
is	O
a	O
light	B-Device
gun	I-Device
arcade	O
game	O
developed	O
by	O
Atari	O
Games	O
and	O
released	O
in	O
1998	O
.	O
</s>
<s>
It	O
is	O
a	O
sequel	O
to	O
the	O
original	O
Area	B-Application
51	I-Application
,	O
picking	O
up	O
where	O
that	O
game	O
left	O
off	O
.	O
</s>
<s>
Though	O
the	O
graphics	O
have	O
been	O
improved	O
,	O
they	O
rely	O
on	O
the	O
same	O
FMV	B-Application
streaming	O
technology	O
as	O
the	O
original	O
,	O
and	O
the	O
gameplay	O
remains	O
largely	O
the	O
same	O
as	O
the	O
original	O
game	O
.	O
</s>
<s>
Completing	O
all	O
the	O
training	O
challenges	O
will	O
involve	O
shooting	O
zombies	B-Application
that	O
are	O
contained	O
in	O
the	O
labs	O
,	O
shooting	O
barrels	O
being	O
thrown	O
right	O
at	O
you	O
,	O
protecting	O
a	O
bus	O
from	O
aliens	O
trying	O
to	O
roll	O
it	O
over	O
,	O
and	O
destroying	O
alien	O
ships	O
,	O
turrets	O
,	O
and	O
missiles	O
.	O
</s>
<s>
In	O
the	O
final	O
mission	O
,	O
the	O
player	O
must	O
go	O
into	O
a	O
vast	O
warehouse	O
to	O
destroy	O
a	O
giant	O
red	O
alien	O
with	O
multiple	O
limbs	O
,	O
shooting	O
zombies	B-Application
and	O
aliens	O
.	O
</s>
