<s>
Sabotage	B-Device
is	O
a	O
fixed	O
shooter	O
video	O
game	O
for	O
the	O
Apple	B-Device
II	I-Device
series	I-Device
of	O
computers	O
,	O
written	O
by	O
Mark	O
Allen	O
and	O
published	O
by	O
On-Line	O
Systems	O
in	O
1981	O
.	O
</s>
<s>
The	O
player	O
controls	O
a	O
gun	O
turret	O
at	O
the	O
bottom	O
of	O
the	O
screen	O
by	O
either	O
keyboard	O
,	O
paddle	B-Device
control	I-Device
,	O
or	O
a	O
single	O
axis	O
of	O
a	O
joystick	O
.	O
</s>
<s>
Helicopters	B-Application
fly	O
across	O
the	O
screen	O
at	O
varying	O
heights	O
,	O
progressively	O
lower	O
over	O
time	O
,	O
dropping	O
paratroopers	B-Application
.	O
</s>
<s>
Waves	O
consist	O
of	O
helicopters	B-Application
coming	O
at	O
progressively	O
lower	O
altitudes	O
,	O
a	O
brief	O
rest	O
,	O
then	O
a	O
wave	O
of	O
jets	O
.	O
</s>
<s>
The	O
player	O
earns	O
points	O
by	O
shooting	O
helicopters	B-Application
(	O
5	O
points	O
)	O
,	O
paratroopers	B-Application
(	O
2	O
points	O
)	O
,	O
jets	O
(	O
5	O
points	O
)	O
,	O
and	O
bombs	O
(	O
25	O
points	O
)	O
.	O
</s>
<s>
The	O
game	O
ends	O
when	O
the	O
player	O
's	O
turret	O
is	O
hit	O
by	O
a	O
bomb	O
,	O
when	O
a	O
single	O
paratrooper	B-Application
lands	O
directly	O
on	O
the	O
turret	O
base	O
,	O
when	O
three	O
paratroopers	B-Application
safely	O
land	O
atop	O
each	O
other	O
immediately	O
adjacent	O
to	O
the	O
turret	O
base	O
(	O
allowing	O
the	O
third	O
to	O
jump	O
onto	O
the	O
base	O
)	O
,	O
or	O
when	O
four	O
paratroopers	B-Application
safely	O
land	O
on	O
either	O
the	O
left	O
or	O
right	O
of	O
the	O
turret	O
(	O
that	O
is	O
four	O
on	O
one	O
side	O
,	O
not	O
four	O
total	O
)	O
.	O
</s>
<s>
The	O
Sabotage	B-Device
concept	O
has	O
been	O
cloned	O
a	O
number	O
of	O
times	O
:	O
</s>
<s>
Parachute	O
,	O
(	O
preloaded	O
on	O
the	O
third-generation	O
)	O
iPod	B-Device
and	O
later	O
models	O
.	O
</s>
