<s>
Ghostbusters	B-Operating_System
is	O
a	O
licensed	O
game	O
by	O
Activision	O
based	O
on	O
the	O
film	B-Operating_System
of	O
the	O
same	O
name	O
.	O
</s>
<s>
It	O
was	O
designed	O
by	O
David	O
Crane	O
and	O
released	O
for	O
several	O
home	O
computer	O
platforms	O
in	O
1984	O
,	O
and	O
later	O
for	O
video	O
game	O
console	O
systems	O
,	O
including	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
,	O
Master	O
System	O
and	O
Nintendo	O
Entertainment	O
System	O
.	O
</s>
<s>
All	O
versions	O
of	O
the	O
game	O
were	O
released	O
in	O
the	O
USA	O
except	O
for	O
the	O
Amstrad	B-Device
CPC	I-Device
and	O
ZX	B-Operating_System
Spectrum	I-Operating_System
versions	O
,	O
which	O
were	O
released	O
only	O
in	O
Europe	O
,	O
and	O
the	O
MSX	B-Operating_System
version	O
,	O
which	O
was	O
released	O
only	O
in	O
Europe	O
,	O
South	O
America	O
,	O
and	O
Japan	O
.	O
</s>
<s>
In	O
1984	O
,	O
after	O
the	O
film	B-Operating_System
Ghostbusters	B-Operating_System
had	O
been	O
launched	O
,	O
John	O
Dolgen	O
VP	O
of	O
Business	O
Development	O
at	O
Columbia	O
Pictures	O
approached	O
Gregory	O
Fischbach	O
(	O
President	O
of	O
Activision	O
International	O
and	O
subsequently	O
CEO	O
and	O
Co-founder	O
of	O
Acclaim	O
Entertainment	O
)	O
and	O
offered	O
to	O
license	O
the	O
game	O
rights	O
to	O
Activision	O
without	O
specific	O
rules	O
or	O
requests	O
for	O
the	O
design	O
or	O
content	O
of	O
the	O
game	O
,	O
only	O
stipulating	O
that	O
it	O
was	O
to	O
be	O
finished	O
as	O
quickly	O
as	O
possible	O
in	O
order	O
to	O
be	O
released	O
while	O
the	O
movie	O
was	O
at	O
peak	O
popularity	O
.	O
</s>
<s>
Activision	O
had	O
at	O
the	O
time	O
a	O
rough	O
concept	O
for	O
a	O
driving/maze	O
game	O
to	O
be	O
called	O
"	O
Car	O
Wars	O
"	O
,	O
and	O
it	O
was	O
decided	O
to	O
build	O
the	O
Ghostbusters	B-Operating_System
game	O
from	O
it	O
.	O
</s>
<s>
The	O
player	O
sets	O
up	O
a	O
Ghostbusters	B-Operating_System
franchise	O
in	O
a	O
city	O
whose	O
psychokinetic	O
(	O
PK	O
)	O
energy	O
levels	O
have	O
begun	O
to	O
rise	O
.	O
</s>
<s>
Upon	O
reaching	O
the	O
site	O
,	O
the	O
player	O
must	O
maneuver	O
two	O
Ghostbusters	B-Operating_System
to	O
guide	O
a	O
Slimer	O
ghost	O
into	O
position	O
to	O
be	O
drawn	O
into	O
a	O
trap	O
.	O
</s>
<s>
The	O
player	O
must	O
return	O
to	O
the	O
Ghostbusters	B-Operating_System
headquarters	O
at	O
intervals	O
to	O
empty	O
the	O
traps	O
and/or	O
revive	O
any	O
incapacitated	O
team	O
members	O
.	O
</s>
<s>
Otherwise	O
,	O
the	O
player	O
must	O
guide	O
at	O
least	O
two	O
Ghostbusters	B-Operating_System
past	O
Mr.	O
Stay	O
Puft	O
in	O
order	O
to	O
destroy	O
the	O
temple	O
of	O
Zuul	O
.	O
</s>
<s>
In	O
some	O
versions	O
,	O
including	O
those	O
for	O
the	O
Apple	B-Device
IIe	I-Device
and	O
Commodore	O
64	O
,	O
the	O
player	O
is	O
given	O
an	O
account	O
number	O
upon	O
completing	O
the	O
game	O
.	O
</s>
<s>
Most	O
versions	O
of	O
the	O
game	O
feature	O
a	O
sampled	O
rendition	O
of	O
the	O
"	O
Ghostbusters	B-Operating_System
!	O
"	O
</s>
<s>
cry	O
at	O
the	O
start	O
of	O
the	O
movie	O
's	O
theme	O
song	O
;	O
on	O
the	O
C64	O
and	O
Atari	O
8bit	O
versions	O
,	O
this	O
was	O
produced	O
within	O
the	O
game	O
using	O
a	O
patented	O
form	O
of	O
compression	O
similar	O
to	O
ADPCM	B-Algorithm
by	O
ESS	O
(	O
Electronic	O
Speech	O
Systems	O
)	O
,	O
all	O
without	O
requiring	O
external	O
hardware	O
to	O
produce	O
the	O
speech	O
.	O
</s>
<s>
The	O
PCjr/Tandy	O
port	O
does	O
not	O
have	O
this	O
feature	O
.	O
</s>
<s>
Ghostbusters	B-Operating_System
was	O
ported	O
to	O
the	O
IBM	B-Device
PCjr	I-Device
and	O
Tandy	O
1000	O
in	O
1985	O
.	O
</s>
<s>
The	O
game	O
was	O
ported	O
to	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
by	O
programmer	O
Dan	O
Kitchen	O
(	O
brother	O
of	O
Garry	O
Kitchen	O
)	O
,	O
shortly	O
before	O
he	O
ported	O
Kung-Fu	B-Application
Master	I-Application
to	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
.	O
</s>
<s>
Ghostbusters	B-Operating_System
topped	O
the	O
monthly	O
UK	O
software	O
sales	O
charts	O
for	O
three	O
months	O
in	O
early	O
1985	O
,	O
from	O
January	O
to	O
March	O
.	O
</s>
<s>
Released	O
before	O
the	O
film	B-Operating_System
in	O
the	O
UK	O
,	O
it	O
went	O
on	O
to	O
be	O
the	O
UK	O
's	O
fourth	O
best-selling	O
home	B-Application
video	I-Application
game	I-Application
of	I-Application
1985	I-Application
.	O
</s>
<s>
In	O
1985	O
,	O
it	O
and	O
The	B-Application
Print	I-Application
Shop	I-Application
were	O
reportedly	O
the	O
two	O
most	O
widely	O
pirated	O
Commodore	O
64	O
programs	O
.	O
</s>
<s>
II	O
Computing	O
listed	O
Ghostbusters	B-Operating_System
eighth	O
on	O
the	O
magazine	O
's	O
list	O
of	O
top	O
Apple	B-Device
II	I-Device
games	O
as	O
of	O
late	O
1985	O
,	O
based	O
on	O
sales	O
and	O
market-share	O
data	O
,	O
and	O
it	O
was	O
Activision	O
's	O
best-selling	O
Commodore	O
game	O
as	O
of	O
late	O
1987	O
.	O
</s>
<s>
The	O
Atari	B-General_Concept
2600	I-General_Concept
version	O
sold	O
about	O
40,000	O
units	O
.	O
</s>
<s>
The	O
Amstrad	B-Device
CPC	I-Device
and	O
ZX	B-Operating_System
Spectrum	I-Operating_System
versions	O
of	O
the	O
game	O
were	O
included	O
on	O
the	O
1986	O
compilation	O
They	O
Sold	O
a	O
Million	O
3	O
,	O
along	O
with	O
Fighter	O
Pilot	O
,	O
Rambo	B-Application
and	O
Kung-Fu	B-Application
Master	I-Application
.	O
</s>
<s>
It	O
knocked	O
Daley	B-Application
Thompson	I-Application
's	I-Application
Decathlon	I-Application
from	O
the	O
top	O
of	O
the	O
UK	O
sales	O
chart	O
.	O
</s>
<s>
In	O
1988	O
,	O
Mastertronic	O
re-released	O
the	O
Amstrad	O
,	O
Commodore	O
,	O
Spectrum	O
and	O
Atari	O
computer	O
versions	O
of	O
Ghostbusters	B-Operating_System
on	O
their	O
Ricochet	O
label	O
and	O
it	O
went	O
on	O
to	O
become	O
their	O
most	O
successful	O
budget	O
re-release	O
,	O
selling	O
over	O
450,000	O
copies	O
.	O
</s>
<s>
Antic	O
in	O
May	O
1985	O
called	O
Ghostbusters	B-Operating_System
the	O
first	O
adaptation	O
to	O
capture	O
both	O
the	O
feel	O
and	O
the	O
theme	O
of	O
the	O
movie	O
on	O
which	O
it	O
is	O
based	O
,	O
calling	O
it	O
enjoyable	O
to	O
play	O
.	O
</s>
<s>
Edge	O
in	O
2007	O
called	O
Ghostbusters	B-Operating_System
"	O
dauntingly	O
good	O
"	O
,	O
noting	O
that	O
despite	O
the	O
action	B-Application
sequences	O
expected	O
of	O
a	O
licensed	O
title	O
,	O
the	O
game	O
was	O
a	O
"	O
polished	O
,	O
intelligently-paced	O
"	O
,	O
strategic	O
business	O
simulation	O
.	O
</s>
