<s>
Gun	B-Application
Fight	I-Application
,	O
known	O
as	O
in	O
Japan	O
and	O
Europe	O
,	O
is	O
a	O
1975	O
multidirectional	O
shooter	O
arcade	O
game	O
designed	O
by	O
Tomohiro	O
Nishikado	O
,	O
and	O
released	O
by	O
Taito	O
in	O
Japan	O
and	O
Europe	O
and	O
by	O
Midway	O
in	O
North	O
America	O
.	O
</s>
<s>
Based	O
around	O
two	O
Old	O
West	O
cowboys	O
armed	O
with	O
revolvers	O
and	O
squaring	O
off	O
in	O
a	O
duel	O
,	O
it	O
was	O
the	O
first	O
video	O
game	O
to	O
depict	O
human-to-human	O
combat	B-Application
.	O
</s>
<s>
The	O
Midway	O
version	O
was	O
also	O
the	O
first	O
video	O
game	O
to	O
use	O
a	O
microprocessor	B-Architecture
.	O
</s>
<s>
The	O
game	O
's	O
concept	O
was	O
adapted	O
from	O
Sega	O
's	O
1969	O
arcade	O
electro-mechanical	O
game	O
Gun	B-Application
Fight	I-Application
.	O
</s>
<s>
In	O
Japan	O
,	O
Western	B-Application
Gun	I-Application
was	O
among	O
the	O
top	O
ten	O
highest-grossing	O
arcade	B-Application
video	I-Application
games	I-Application
of	I-Application
1976	I-Application
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
Gun	B-Application
Fight	I-Application
sold	O
8,600	O
arcade	O
cabinets	O
and	O
was	O
the	O
third	O
highest-grossing	O
arcade	B-Application
game	I-Application
of	I-Application
1975	I-Application
,	O
second	O
highest-grossing	O
arcade	B-Application
game	I-Application
of	I-Application
1976	I-Application
and	O
fifth	O
highest	O
arcade	B-Application
game	I-Application
of	I-Application
1977	I-Application
.	O
</s>
<s>
It	O
was	O
ported	O
to	O
the	O
Bally	B-Device
Astrocade	I-Device
video	B-Device
game	I-Device
console	I-Device
as	O
a	O
built-in	O
game	O
in	O
1977	O
and	O
later	O
the	O
Atari	B-Device
8-bit	I-Device
family	I-Device
.	O
</s>
<s>
Western	B-Application
Gun	I-Application
is	O
a	O
single-screen	O
shooter	O
where	O
two	O
players	O
compete	O
in	O
an	O
Old	O
West	O
gun	B-Application
fight	I-Application
.	O
</s>
<s>
It	O
was	O
the	O
first	O
video	O
game	O
to	O
depict	O
human-to-human	O
combat	B-Application
.	O
</s>
<s>
The	O
game	O
has	O
two	O
joysticks	B-Device
per	O
player	O
:	O
an	O
eight-way	O
joystick	B-Device
for	O
moving	O
the	O
computerized	O
cowboy	O
and	O
the	O
other	O
for	O
changing	O
the	O
shooting	O
direction	O
.	O
</s>
<s>
Unlike	O
later	O
dual	O
stick	O
games	O
,	O
Western	B-Application
Gun	I-Application
has	O
the	O
movement	O
joystick	B-Device
on	O
the	O
right	O
.	O
</s>
<s>
Obstacles	O
between	O
the	O
characters	O
block	O
shots	O
,	O
such	O
as	O
a	O
cactus	B-Language
,	O
and	O
(	O
in	O
later	O
levels	O
)	O
stagecoaches	O
.	O
</s>
<s>
Taito	O
's	O
original	O
Western	B-Application
Gun	I-Application
allows	O
the	O
two	O
players	O
to	O
move	O
around	O
anywhere	O
on	O
the	O
screen	O
.	O
</s>
<s>
Midway	O
's	O
version	O
,	O
Gun	B-Application
Fight	I-Application
,	O
restricts	O
each	O
player	O
to	O
their	O
respective	O
portions	O
of	O
the	O
screen	O
and	O
also	O
increased	O
the	O
size	O
of	O
the	O
characters	O
.	O
</s>
<s>
Both	O
Western	B-Application
Gun	I-Application
and	O
Gun	B-Application
Fight	I-Application
have	O
artwork	O
of	O
Wild	O
West	O
cowboys	O
on	O
the	O
cabinet	O
,	O
with	O
matching	O
in-game	O
graphics	O
featuring	O
cacti	O
,	O
rocks	O
,	O
and	O
human	O
characters	O
(	O
and	O
a	O
covered	O
wagon	O
in	O
Gun	B-Application
Fight	I-Application
)	O
.	O
</s>
<s>
The	O
original	O
game	O
,	O
Western	B-Application
Gun	I-Application
,	O
was	O
created	O
by	O
Tomohiro	O
Nishikado	O
for	O
Taito	O
.	O
</s>
<s>
The	O
game	O
's	O
concept	O
was	O
adapted	O
from	O
a	O
Sega	O
arcade	O
electro-mechanical	O
game	O
,	O
also	O
called	O
Gun	B-Application
Fight	I-Application
,	O
which	O
was	O
released	O
in	O
1969	O
.	O
</s>
<s>
Taito	O
licensed	O
Western	B-Application
Gun	I-Application
to	O
Midway	O
for	O
release	O
in	O
North	O
America	O
,	O
one	O
of	O
the	O
first	O
such	O
licenses	O
,	O
after	O
the	O
1974	O
scrolling	O
racing	O
game	O
Speed	B-Application
Race	I-Application
,	O
also	O
designed	O
by	O
Nishikado	O
,	O
and	O
the	O
1974	O
sports	O
game	O
Basketball	O
.	O
</s>
<s>
The	O
title	O
Western	B-Application
Gun	I-Application
,	O
while	O
making	O
perfect	O
sense	O
for	O
Japanese	O
audiences	O
in	O
that	O
it	O
conveyed	O
the	O
setting	O
and	O
theme	O
as	O
simply	O
as	O
possible	O
,	O
sounded	O
odd	O
to	O
American	O
audiences	O
,	O
so	O
it	O
was	O
renamed	O
Gun	B-Application
Fight	I-Application
for	O
its	O
American	O
localization	O
.	O
</s>
<s>
When	O
Dave	O
Nutting	O
adapted	O
the	O
game	O
for	O
Midway	O
,	O
he	O
decided	O
to	O
base	O
it	O
on	O
the	O
Intel	B-General_Concept
8080	I-General_Concept
,	O
which	O
made	O
Gun	B-Application
Fight	I-Application
the	O
first	O
video	O
game	O
to	O
use	O
a	O
microprocessor	B-Architecture
.	O
</s>
<s>
Nutting	O
's	O
company	O
Dave	O
Nutting	O
Associates	O
had	O
already	O
used	O
microprocessor	B-Architecture
technology	O
in	O
prototypes	O
of	O
arcade	O
pinball	B-Application
machines	O
,	O
and	O
the	O
first	O
arcade	O
pinball	B-Application
machine	O
to	O
include	O
a	O
microprocessor	B-Architecture
,	O
The	O
Spirit	O
of	O
'	O
76	O
by	O
Mirco	O
Games	O
,	O
used	O
this	O
technology	O
under	O
license	O
.	O
</s>
<s>
Midway	O
's	O
version	O
,	O
which	O
had	O
a	O
black-and-white	O
raster	B-Algorithm
monitor	B-Device
with	O
a	O
transparent	O
yellow	O
screen	O
overlay	O
,	O
used	O
bitmapped	B-Algorithm
framebuffer	B-Algorithm
technology	O
to	O
display	O
the	O
game	O
text	O
and	O
graphics	O
,	O
including	O
its	O
animated	O
human-like	O
characters	O
.	O
</s>
<s>
The	O
microprocessor	B-Architecture
used	O
this	O
to	O
shift	O
each	O
pattern	O
of	O
picture	O
bits	O
,	O
byte-by-byte	O
,	O
to	O
the	O
proper	O
horizontal	O
bit	O
offset	O
,	O
reading	O
back	O
each	O
shifted	O
byte	O
and	O
then	O
writing	O
it	O
into	O
the	O
framebuffer	B-Algorithm
.	O
</s>
<s>
The	O
8080	B-General_Concept
,	O
like	O
other	O
microprocessors	B-Architecture
of	O
its	O
era	O
,	O
had	O
shift	O
instructions	O
that	O
could	O
only	O
shift	O
by	O
a	O
single	O
bit	O
position	O
.	O
</s>
<s>
With	O
the	O
shifter	O
circuit	O
,	O
the	O
microprocessor	B-Architecture
could	O
quickly	O
shift	O
a	O
picture	O
byte	O
by	O
several	O
bit	O
positions	O
,	O
giving	O
it	O
more	O
time	O
for	O
other	O
work	O
.	O
</s>
<s>
A	O
similar	O
shifter	O
circuit	O
was	O
used	O
in	O
later	O
Midway	O
and	O
Taito	O
games	O
whose	O
hardware	O
was	O
based	O
on	O
Gun	B-Application
Fight	I-Application
,	O
such	O
as	O
Sea	B-Application
Wolf	I-Application
and	O
Space	B-Application
Invaders	I-Application
.	O
</s>
<s>
(	O
In	O
some	O
later	O
Space	B-Application
Invaders	I-Application
derivatives	O
,	O
such	O
as	O
Taito	O
's	O
Space	B-Application
Invaders	I-Application
Part	I-Application
II	I-Application
of	O
1979	O
,	O
this	O
circuit	O
is	O
a	O
Fujitsu	O
MB14241	O
,	O
a	O
single-chip	O
implementation	O
of	O
the	O
barrel	O
shifter	O
.	O
)	O
</s>
<s>
This	O
led	O
him	O
to	O
design	O
microprocessors	B-Architecture
into	O
his	O
subsequent	O
games	O
,	O
including	O
the	O
1978	O
shoot	O
'	O
em	O
up	O
Space	B-Application
Invaders	I-Application
.	O
</s>
<s>
In	O
Japan	O
,	O
Western	B-Application
Gun	I-Application
was	O
among	O
the	O
top	O
ten	O
highest-grossing	O
arcade	B-Application
video	I-Application
games	I-Application
of	I-Application
1976	I-Application
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
following	O
its	O
November	O
1975	O
release	O
there	O
,	O
Gun	B-Application
Fight	I-Application
sold	O
500	O
arcade	O
cabinets	O
by	O
the	O
end	O
of	O
1975	O
,	O
making	O
it	O
one	O
of	O
the	O
top	O
ten	O
best-selling	O
arcade	B-Application
games	I-Application
of	I-Application
1975	I-Application
.	O
</s>
<s>
In	O
March	O
1976	O
,	O
the	O
first	O
annual	O
RePlay	O
arcade	O
chart	O
listed	O
Gun	B-Application
Fight	I-Application
as	O
the	O
third	O
highest-grossing	O
arcade	O
game	O
of	O
the	O
previous	O
year	O
in	O
the	O
United	O
States	O
,	O
below	O
the	O
Kee	O
game	O
Tank	B-Application
I	I-Application
&	I-Application
II	I-Application
and	O
Taito/Midway	O
game	O
Wheels	B-Application
I	I-Application
&	I-Application
II	I-Application
.	O
</s>
<s>
In	O
October	O
1976	O
,	O
RePlay	O
listed	O
Gun	B-Application
Fight	I-Application
as	O
the	O
second	O
highest-grossing	O
arcade	B-Application
game	I-Application
of	I-Application
1976	I-Application
in	O
the	O
United	O
States	O
,	O
below	O
Midway	O
's	O
Sea	B-Application
Wolf	I-Application
.	O
</s>
<s>
In	O
November	O
1977	O
,	O
the	O
first	O
annual	O
Play	O
Meter	O
arcade	O
chart	O
listed	O
Gun	B-Application
Fight	I-Application
as	O
the	O
fifth	O
highest-grossing	O
arcade	B-Application
video	I-Application
game	I-Application
of	I-Application
1977	I-Application
.	O
</s>
<s>
Play	O
Meter	O
later	O
listed	O
it	O
among	O
the	O
top	O
30	O
highest-grossing	O
arcade	B-Application
games	I-Application
of	I-Application
1978	I-Application
.	O
</s>
<s>
In	O
2021	O
,	O
The	O
Guardian	O
listed	O
it	O
as	O
the	O
eleventh	O
greatest	O
video	B-Application
game	I-Application
of	I-Application
the	I-Application
1970s	I-Application
.	O
</s>
<s>
In	O
1978	O
,	O
the	O
game	O
was	O
introduced	O
to	O
the	O
home	O
market	O
with	O
a	O
port	O
to	O
the	O
Bally	B-Device
Astrocade	I-Device
,	O
which	O
included	O
a	O
color	O
version	O
of	O
the	O
game	O
within	O
the	O
system	O
's	O
ROM	B-Device
.	O
</s>
<s>
In	O
1983	O
,	O
Epyx	O
released	O
Gun	B-Application
Fight	I-Application
and	O
another	O
Midway	O
game	O
,	O
Sea	B-Application
Wolf	I-Application
II	I-Application
,	O
for	O
the	O
Atari	B-Device
8-bit	I-Device
family	I-Device
as	O
an	O
Arcade	O
Classics	O
compilation	O
.	O
</s>
<s>
They	O
stated	O
that	O
"	O
Gun	B-Application
Fight	I-Application
was	O
the	O
first	O
game	O
to	O
feature	O
two	O
humanized	O
characters	O
attempting	O
to	O
outfight	O
each	O
other	O
,	O
which	O
would	O
become	O
one	O
of	O
the	O
most	O
common	O
themes	O
in	O
games	O
for	O
the	O
next	O
25-plus	O
years	O
"	O
;	O
that	O
it	O
was	O
one	O
of	O
the	O
first	O
Japanese	O
video	O
games	O
imported	O
to	O
North	O
America	O
;	O
and	O
that	O
Midway	O
's	O
version	O
"	O
was	O
the	O
first	O
microprocessor-based	O
arcade	O
game.	O
"	O
</s>
<s>
Atari	O
,	O
Inc	O
.	O
released	O
a	O
similar	O
arcade	O
game	O
in	O
1976	O
titled	O
Outlaw	B-Application
which	O
was	O
ported	O
to	O
the	O
Atari	B-General_Concept
VCS	I-General_Concept
.	O
</s>
<s>
In	O
1982	O
,	O
the	O
clone	O
Gunfight	O
was	O
released	O
for	O
the	O
Atari	B-Device
8-bit	I-Device
family	I-Device
by	O
Hofacker	O
/	O
Elcomp	O
Publishing	O
.	O
</s>
<s>
Taito	O
used	O
a	O
control	O
scheme	O
similar	O
to	O
Western	B-Application
Gun	I-Application
for	O
the	O
run	O
and	O
gun	O
video	O
game	O
Front	B-Application
Line	I-Application
(	O
1982	O
)	O
.	O
</s>
<s>
In	O
1995	O
,	O
GamesMaster	O
host	O
Dominik	O
Diamond	O
called	O
Sega	O
's	O
arcade	O
game	O
Virtual	B-Application
On	I-Application
:	I-Application
Cyber	I-Application
Troopers	I-Application
"	O
a	O
futuristic	O
version	O
of	O
the	O
old	O
Gun	B-Application
Fight	I-Application
game.	O
"	O
</s>
