<s>
John	B-Device
Elway	I-Device
's	I-Device
Quarterback	I-Device
,	O
also	O
known	O
as	O
John	B-Device
Elway	I-Device
's	I-Device
Quarterback	I-Device
Challenge	I-Device
and	O
John	B-Device
Elway	I-Device
's	I-Device
Team	I-Device
Quarterback	I-Device
,	O
is	O
a	O
1987	B-Application
football	B-Application
video	O
game	O
.	O
</s>
<s>
Tradewest	O
developed	O
Quarterback	B-Application
as	O
an	O
arcade	O
game	O
.	O
</s>
<s>
In	O
1988	B-Application
John	O
Elway	O
agreed	O
to	O
endorse	O
it	O
,	O
and	O
the	O
company	O
renamed	O
the	O
game	O
John	B-Device
Elway	I-Device
's	I-Device
Quarterback	I-Device
.	O
</s>
<s>
Tradewest	O
released	O
a	O
version	O
for	O
the	O
Nintendo	O
Entertainment	O
System	O
and	O
Melbourne	O
House	O
for	O
various	O
home	O
computers	O
such	O
as	O
Commodore	O
64	O
,	O
ZX	B-Operating_System
Spectrum	I-Operating_System
,	O
IBM	O
PC	O
,	O
Apple	B-Device
II	I-Device
,	O
and	O
Apple	B-Device
IIGS	I-Device
.	O
</s>
<s>
There	O
is	O
a	O
spring-loaded	O
joystick	B-Device
which	O
allows	O
the	O
player	O
to	O
angle	O
and	O
release	O
according	O
to	O
where	O
they	O
were	O
throwing	O
(	O
for	O
the	O
quarterback	B-Application
)	O
or	O
kicking	O
.	O
</s>
<s>
In	O
the	O
"	O
normal	O
play	O
,	O
"	O
the	O
quarterback	B-Application
must	O
pass	O
the	O
ball	O
quickly	O
to	O
avoid	O
being	O
sacked	O
,	O
as	O
the	O
offensive	O
line	O
collapses	O
unusually	O
quickly	O
in	O
this	O
formation	O
.	O
</s>
