<s>
Avalanche	B-Application
is	O
an	O
arcade	B-Application
video	I-Application
game	I-Application
designed	O
by	O
Dennis	O
Koble	O
and	O
released	O
by	O
Atari	O
,	O
Inc	O
.	O
in	O
1978	B-Application
.	O
</s>
<s>
The	O
object	O
is	O
to	O
catch	O
falling	O
rocks	O
with	O
a	O
controllable	O
set	O
of	O
paddles	B-Device
that	O
diminish	O
in	O
number	O
and	O
size	O
as	O
the	O
rocks	O
fall	O
faster	O
and	O
faster	O
.	O
</s>
<s>
The	O
concept	O
gained	O
a	O
much	O
wider	O
audience	O
after	O
Activision	O
released	O
an	O
unauthorized	O
adaptation	O
in	O
1981	O
as	O
Kaboom	B-Application
!	I-Application
</s>
<s>
for	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
.	O
</s>
<s>
The	O
only	O
official	O
home	O
port	O
of	O
Avalanche	B-Application
is	O
for	O
the	O
Atari	B-Device
8-bit	I-Device
family	I-Device
.	O
</s>
<s>
Avalanche	B-Application
is	O
for	O
1	O
or	O
2	O
players	O
,	O
alternating	O
turns	O
.	O
</s>
<s>
According	O
to	O
the	O
manual	O
for	O
the	O
Atari	O
home	O
computer	O
version	O
,	O
Avalanche	B-Application
started	O
out	O
as	O
a	O
game	O
about	O
eggs	O
and	O
baskets	O
called	O
Catch	O
.	O
</s>
<s>
Avalanche	B-Application
is	O
housed	O
in	O
a	O
custom	O
cabinet	O
that	O
includes	O
two	O
large	O
lit	O
start	O
buttons	O
and	O
a	O
rotary	O
controller	O
.	O
</s>
<s>
The	O
screen	O
is	O
black	O
and	O
white	O
with	O
two	O
colored	O
strips	O
to	O
provide	O
colored	O
rows	O
of	O
graphics	O
as	O
in	O
Breakout	B-Application
.	O
</s>
<s>
The	O
circuit	O
board	O
is	O
based	O
on	O
the	O
6502	B-General_Concept
CPU	O
,	O
with	O
game	O
code	O
stored	O
in	O
multiple	O
ROMs	B-Device
.	O
</s>
<s>
Avalanche	B-Application
also	O
includes	O
a	O
built-in	O
self-test	O
diagnostic	O
program	O
that	O
displays	O
all	O
microprocessor	O
and	O
memory	O
functions	O
,	O
including	O
all	O
operator	O
switches	O
and	O
functions	O
.	O
</s>
<s>
Dennis	O
Koble	O
's	O
official	O
port	O
of	O
Avalanche	B-Application
for	O
the	O
Atari	B-Device
8-bit	I-Device
computers	I-Device
was	O
published	O
through	O
the	O
Atari	B-Application
Program	I-Application
Exchange	I-Application
in	O
1981	O
instead	O
of	O
official	O
Atari	O
channels	O
.	O
</s>
<s>
It	O
requires	O
the	O
paddle	B-Device
controller	I-Device
.	O
</s>
<s>
Avalanche	B-Application
inspired	O
many	O
similar	O
games	O
including	O
Kaboom	B-Application
!	I-Application
</s>
<s>
by	O
Activision	O
,	O
Lost	B-Application
Luggage	I-Application
,	O
and	O
Eggomania	B-Application
,	O
all	O
for	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
.	O
</s>
<s>
Chicken	B-Application
for	O
the	O
Atari	B-Device
8-bit	I-Device
family	I-Device
and	O
Popcorn	O
for	O
the	O
TRS-80	B-Device
Color	I-Device
Computer	I-Device
are	O
others	O
.	O
</s>
