<s>
Asteroids	B-Application
Deluxe	I-Application
is	O
a	O
multidirectional	O
shooter	O
arcade	B-Application
video	I-Application
game	I-Application
with	O
monochrome	O
vector	O
graphics	O
released	O
in	O
April	O
1981	O
by	O
Atari	O
,	O
Inc	O
.	O
</s>
<s>
It	O
is	O
the	O
sequel	O
to	O
Asteroids	B-Application
and	O
was	O
designed	O
to	O
combat	O
the	O
saucer-hunting	O
strategy	O
of	O
the	O
original	O
allowing	O
experts	O
to	O
play	O
for	O
extended	O
periods	O
.	O
</s>
<s>
Ports	O
of	O
Asteroids	B-Application
Deluxe	I-Application
were	O
released	O
for	O
the	O
BBC	B-Device
Micro	I-Device
in	O
1984	O
and	O
the	O
Atari	B-Device
ST	I-Device
in	O
1987	O
.	O
</s>
<s>
The	O
game	O
was	O
followed-up	O
with	O
Space	B-Application
Duel	I-Application
in	O
1982	O
and	O
the	O
more	O
direct	O
sequel	O
Blasteroids	B-Application
in	O
1987	O
.	O
</s>
<s>
Like	O
in	O
the	O
original	O
Asteroids	B-Application
,	O
the	O
objective	O
is	O
to	O
score	O
points	O
by	O
destroying	O
asteroids	B-Application
and	O
flying	B-Language
saucers	I-Language
.	O
</s>
<s>
When	O
shot	O
,	O
larger	O
asteroids	B-Application
break	O
apart	O
into	O
smaller	O
pieces	O
and	O
fly	O
in	O
random	O
directions	O
,	O
while	O
the	O
smallest	O
asteroids	B-Application
are	O
destroyed	O
when	O
hit	O
.	O
</s>
<s>
Deluxe	O
replaces	O
the	O
hyperspace	B-Application
feature	O
with	O
shields	O
which	O
deplete	O
with	O
use	O
.	O
</s>
<s>
This	O
game	O
also	O
introduces	O
the	O
"	O
Killer	O
Satellite	B-Application
"	O
,	O
a	O
cluster	O
of	O
ships	O
that	O
break	O
apart	O
and	O
chase	O
the	O
player	O
's	O
ship	O
when	O
hit	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
shield	O
feature	O
and	O
the	O
Killer	O
Satellite	B-Application
,	O
the	O
most	O
significant	O
change	O
in	O
this	O
version	O
of	O
the	O
game	O
is	O
that	O
the	O
flying	B-Language
saucers	I-Language
can	O
now	O
target	O
the	O
player	O
's	O
ship	O
across	O
the	O
screen	O
boundary	O
-	O
meaning	O
that	O
if	O
the	O
saucer	O
is	O
close	O
to	O
the	O
left	O
edge	O
and	O
the	O
player	O
is	O
at	O
the	O
right	O
edge	O
,	O
the	O
saucer	O
may	O
shoot	O
toward	O
the	O
left	O
edge	O
and	O
across	O
the	O
boundary	O
to	O
hit	O
the	O
player	O
since	O
their	O
ship	O
is	O
closer	O
that	O
direction	O
.	O
</s>
<s>
In	O
Asteroids	B-Application
,	O
the	O
saucers	O
could	O
only	O
fire	O
directly	O
at	O
the	O
player	O
's	O
location	O
on	O
screen	O
without	O
considering	O
the	O
boundary	O
,	O
which	O
led	O
to	O
the	O
popular	O
"	O
lurking	O
"	O
exploit	O
that	O
enabled	O
players	O
to	O
play	O
for	O
very	O
long	O
periods	O
of	O
time	O
on	O
a	O
single	O
credit	O
.	O
</s>
<s>
The	O
Asteroids	B-Application
Deluxe	I-Application
arcade	B-Application
machine	O
is	O
a	O
vector	O
game	O
,	O
with	O
graphics	O
consisting	O
entirely	O
of	O
lines	O
drawn	O
on	O
a	O
vector	B-General_Concept
monitor	I-General_Concept
,	O
which	O
Atari	O
described	O
as	O
"	O
QuadraScan	B-General_Concept
"	O
.	O
</s>
<s>
The	O
key	O
hardware	O
consists	O
of	O
a	O
1.5MHz	O
MOS	B-General_Concept
6502A	I-General_Concept
CPU	B-General_Concept
,	O
which	O
executes	O
the	O
game	O
program	O
,	O
and	O
the	O
Digital	O
Vector	O
Generator	O
(	O
DVG	O
)	O
,	O
the	O
first	O
vector	O
processing	O
circuitry	O
developed	O
by	O
Atari	O
.	O
</s>
<s>
The	O
DVG	O
used	O
for	O
Asteroids	B-Application
Deluxe	I-Application
was	O
designed	O
by	O
Howard	O
Delman	O
,	O
and	O
used	O
earlier	O
in	O
Lunar	B-Application
Lander	I-Application
and	O
Asteroids	B-Application
.	O
</s>
<s>
Most	O
of	O
the	O
sound	O
effects	O
are	O
implemented	O
by	O
custom	O
circuitry	O
,	O
but	O
some	O
are	O
generated	O
via	O
the	O
Atari	B-Device
POKEY	I-Device
sound	O
chip	O
.	O
</s>
