<s>
is	O
an	O
American	B-Application
football	I-Application
video	I-Application
game	I-Application
developed	O
and	O
released	O
by	O
Tehkan	O
(	O
later	O
known	O
as	O
Tecmo	O
)	O
for	O
arcades	O
in	O
1985	O
.	O
</s>
<s>
It	O
is	O
a	O
one	O
or	O
two	O
player	O
game	O
based	O
on	O
gridiron	O
football	O
(	O
American	B-Application
football	I-Application
)	O
,	O
and	O
was	O
released	O
in	O
a	O
cocktail	O
cabinet	O
form	O
factor	O
.	O
</s>
<s>
The	O
game	O
uses	O
trackball	B-Device
controls	O
,	O
used	O
to	O
determine	O
the	O
speed	O
and	O
direction	O
at	O
which	O
the	O
player	O
runs	O
.	O
</s>
<s>
Designed	O
by	O
Shin-ichiro	O
Tomie	O
and	O
programmed	O
by	O
Michihito	O
Ishizuka	O
,	O
with	O
background	O
graphics	O
by	O
his	O
wife	O
Rie	O
Ishizuka	O
(	O
Rie	O
Yatomi	O
)	O
,	O
the	O
same	O
team	O
went	O
on	O
to	O
develop	O
the	O
association	B-Application
football	I-Application
game	I-Application
(	O
soccer	O
game	O
)	O
Tehkan	B-Application
World	I-Application
Cup	I-Application
later	O
the	O
same	O
year	O
.	O
</s>
<s>
It	O
was	O
also	O
a	O
precursor	O
to	O
the	O
American	B-Application
football	I-Application
game	O
Tecmo	B-Application
Cup	I-Application
(	O
1988	O
)	O
.	O
</s>
<s>
Tehkan	O
Gridiron	B-Application
Fight	I-Application
is	O
a	O
two-dimensional	O
top-down	O
scrolling	O
American	B-Application
football	I-Application
game	O
in	O
which	O
the	O
player(s )	O
control	O
the	O
virtual	O
player	O
on	O
their	O
team	O
who	O
is	O
closest	O
to	O
the	O
ball	O
,	O
with	O
the	O
trackball	B-Device
determining	O
the	O
speed	O
and	O
direction	O
at	O
which	O
the	O
player	O
runs	O
.	O
</s>
<s>
(	O
This	O
button	O
is	O
duplicated	O
on	O
either	O
side	O
of	O
the	O
trackball	B-Device
for	O
left	O
or	O
right-handed	O
players	O
.	O
)	O
</s>
<s>
The	O
Player	O
1	O
(	O
red	O
trackball	B-Device
)	O
side	O
contained	O
two	O
additional	O
push-buttons	O
for	O
choosing	O
between	O
Single	O
or	O
Two-Player	O
games	O
.	O
</s>
<s>
Two	O
slightly	O
different	O
cabinet	O
shapes	O
were	O
released	O
-	O
one	O
with	O
straighter	O
edges	O
and	O
vertices	O
in	O
profile	O
and	O
one	O
with	O
more	O
rounded	O
edges	O
akin	O
to	O
its	O
stablemate	O
,	O
Tehkan	B-Application
World	I-Application
Cup	I-Application
.	O
</s>
<s>
Processors	O
and	O
sound	O
—	O
Tehkan	O
Gridiron	B-Application
Fight	I-Application
used	O
two	O
Z80C	B-General_Concept
8-bit	O
CPUs	O
at	O
4.608MHz	O
for	O
processing	O
.	O
</s>
<s>
For	O
sound	O
,	O
it	O
employed	O
one	O
Z80C	B-General_Concept
at	O
4.6MHz	O
,	O
two	O
AY-3-8910s	B-Device
at	O
1.536MHz	O
and	O
one	O
M5205	O
at	O
384kHz	O
for	O
FM	O
and	O
samples	O
.	O
</s>
<s>
Trackballs	B-Device
—	O
The	O
game	O
unit	O
consists	O
of	O
two	O
3	O
"	O
optical	O
trackballs	B-Device
.	O
</s>
<s>
Gridiron	B-Application
Fight	I-Application
was	O
developed	O
by	O
Tehkan	O
.	O
</s>
<s>
The	O
game	O
was	O
designed	O
by	O
Shinichiro	O
Tomie	O
,	O
and	O
programmed	O
by	O
Michihito	O
Ishizuka	O
,	O
who	O
was	O
also	O
responsible	O
for	O
sound	O
design	O
,	O
having	O
previously	O
programmed	O
the	O
sound	O
driver	O
for	O
Bomb	B-Application
Jack	I-Application
(	O
1984	O
)	O
.	O
</s>
<s>
Michihito	O
and	O
Rie	O
Ishizuka	O
had	O
previously	O
worked	O
together	O
on	O
Senjyo	B-Application
(	O
1983	O
)	O
and	O
Bomb	B-Application
Jack	I-Application
.	O
</s>
<s>
In	O
Japan	O
,	O
Game	O
Machine	O
listed	O
Gridiron	B-Application
Fight	I-Application
on	O
their	O
April	O
15	O
,	O
1987	O
issue	O
as	O
being	O
the	O
second	O
most-successful	O
table	O
arcade	O
unit	O
of	O
the	O
month	O
.	O
</s>
<s>
Jay	O
Carter	O
of	O
Cash	O
Box	O
magazine	O
compared	O
the	O
game	O
favorably	O
to	O
the	O
classic	O
Atari	B-Application
Football	I-Application
(	O
1978	O
)	O
,	O
stating	O
that	O
Gridiron	B-Application
Fight	I-Application
updates	O
its	O
essential	O
elements	O
.	O
</s>
<s>
Tehkan	B-Application
World	I-Application
Cup	I-Application
(	O
1985	O
)	O
was	O
an	O
association	B-Application
football	I-Application
video	I-Application
game	I-Application
(	O
soccer	O
game	O
)	O
released	O
later	O
the	O
same	O
year	O
,	O
featuring	O
almost	O
identical	O
hardware	O
.	O
</s>
<s>
It	O
employed	O
the	O
same	O
twin	O
trackballs	B-Device
with	O
an	O
action	O
button	O
duplicated	O
on	O
either	O
side	O
and	O
a	O
similar	O
cocktail	O
cabinet	O
design	O
with	O
horizontal	O
screen	O
.	O
</s>
<s>
After	O
designing	O
Gridiron	B-Application
Fight	I-Application
,	O
he	O
immediately	O
wanted	O
to	O
adapt	O
the	O
gameplay	O
format	O
of	O
Gridiron	B-Application
Fight	I-Application
for	O
a	O
soccer	O
game	O
.	O
</s>
<s>
The	O
team	O
felt	O
the	O
trackball	B-Device
controls	O
of	O
Gridiron	B-Application
Fight	I-Application
was	O
complex	O
,	O
so	O
they	O
decided	O
to	O
simplify	O
the	O
controls	O
,	O
making	O
it	O
so	O
that	O
the	O
player	O
can	O
run	O
with	O
the	O
trackball	B-Device
and	O
press	O
one	O
button	O
to	O
kick	O
.	O
</s>
<s>
This	O
led	O
to	O
Tehkan	B-Application
World	I-Application
Cup	I-Application
becoming	O
a	O
major	O
arcade	O
hit	O
.	O
</s>
