<s>
The	O
Atari	B-Device
XG-1	I-Device
light	I-Device
gun	I-Device
is	O
a	O
video	O
game	O
controller	O
which	O
was	O
released	O
in	O
1987	O
.	O
</s>
<s>
As	O
Atari	O
's	O
only	O
light	B-Device
gun	I-Device
,	O
it	O
is	O
unique	O
to	O
the	O
8-bit	O
family	O
.	O
</s>
<s>
It	O
is	O
compatible	O
with	O
the	O
Atari	B-General_Concept
XEGS	I-General_Concept
,	O
and	O
with	O
the	O
7800	B-General_Concept
and	O
2600	B-General_Concept
home	B-Device
video	I-Device
game	I-Device
consoles	I-Device
.	O
</s>
<s>
It	O
was	O
bundled	O
with	O
the	O
XEGS	B-General_Concept
Deluxe	O
home	O
computer	O
and	O
video	B-Application
game	I-Application
console	I-Application
combination	O
system	O
,	O
and	O
with	O
the	O
light	B-Device
gun	I-Device
game	O
Bug	O
Hunt	O
for	O
the	O
7800	B-General_Concept
as	O
model	O
XES2001	O
for	O
.	O
</s>
<s>
Atari	O
eventually	O
released	O
five	O
light	B-Device
gun	I-Device
games	O
on	O
the	O
7800	B-General_Concept
(	O
Alien	B-Application
Brigade	I-Application
,	O
Barnyard	B-Application
Blaster	I-Application
,	O
Crossbow	B-Application
,	O
Meltdown	B-Application
,	O
and	O
Sentinel	B-Application
)	O
and	O
one	O
on	O
the	O
2600	B-General_Concept
(	O
Sentinel	B-Application
)	O
.	O
</s>
<s>
The	O
XG-1	B-Device
is	O
a	O
specialized	O
light	B-Device
pen	I-Device
.	O
</s>
<s>
Generic	O
light	B-Device
pen	I-Device
support	O
was	O
built	O
into	O
the	O
Atari	B-Device
8-bit	I-Device
home	I-Device
computer	I-Device
family	I-Device
since	O
its	O
1979	O
launch	O
.	O
</s>
<s>
The	O
Atari	O
400/800	O
Hardware	O
Technical	O
Reference	O
recommends	O
a	O
calibration	O
procedure	O
each	O
time	O
a	O
light	B-Device
pen	I-Device
is	O
used	O
,	O
so	O
that	O
the	O
software	O
can	O
compensate	O
for	O
this	O
offset	O
for	O
maximal	O
accuracy	O
.	O
</s>
<s>
Bug	O
Hunt	O
and	O
Barnyard	B-Application
Blaster	I-Application
for	O
the	O
XEGS	B-General_Concept
each	O
have	O
unique	O
hard-coded	O
values	O
.	O
</s>
<s>
A	O
reddish-orange	O
version	O
of	O
the	O
gun	O
was	O
planned	O
for	O
the	O
2600	B-General_Concept
and	O
7800	B-General_Concept
but	O
was	O
never	O
released	O
.	O
</s>
<s>
Sentinel	B-Application
is	O
the	O
only	O
game	O
released	O
for	O
the	O
gun	O
on	O
the	O
2600	B-General_Concept
console	O
,	O
and	O
Shooting	O
Arcade	O
was	O
planned	O
but	O
never	O
released	O
.	O
</s>
<s>
For	O
Antic	O
magazine	O
in	O
August	O
1988	O
,	O
Matthew	O
Ratcliff	O
criticized	O
the	O
poor	O
horizontal	O
accuracy	O
of	O
the	O
XG-1	B-Device
light	I-Device
gun	I-Device
compared	O
to	O
the	O
NES	B-Device
Zapper	I-Device
or	O
the	O
Sega	O
Light	O
Phaser	O
.	O
</s>
<s>
In	O
December	O
1988	O
,	O
he	O
said	O
that	O
,	O
to	O
switch	O
between	O
light	B-Device
gun	I-Device
and	O
joystick	O
games	O
,	O
active	O
XEGS	B-General_Concept
gamers	O
are	O
frustrated	O
by	O
the	O
need	O
to	O
continually	O
re-plug	O
their	O
devices	O
and	O
power	O
cycle	O
the	O
system	O
,	O
due	O
to	O
the	O
system	O
's	O
lack	O
of	O
autodetection	O
,	O
which	O
is	O
complicated	O
by	O
its	O
awkwardly	O
downward	O
slanting	O
ports	O
.	O
</s>
<s>
He	O
said	O
"	O
Barnyard	B-Application
Blaster	I-Application
and	O
Bug	O
Hunt	O
could	O
have	O
been	O
just	O
a	O
bit	O
smarter	O
"	O
by	O
including	O
the	O
simple	O
routine	O
that	O
the	O
magazine	O
was	O
forced	O
to	O
write	O
and	O
publish	O
as	O
a	O
workaround	O
.	O
</s>
<s>
Computing	O
magazine	O
,	O
Matthew	O
Ratcliff	O
wrote	O
a	O
front	O
page	O
feature	O
on	O
programming	O
the	O
XG-1	B-Device
in	O
users	O
 '	O
custom	O
software	O
,	O
including	O
his	O
program	O
allowing	O
the	O
light	B-Device
gun	I-Device
to	O
be	O
used	O
to	O
make	O
menu	O
selections	O
.	O
</s>
<s>
He	O
gave	O
the	O
XG-1	B-Device
a	O
positive	O
review	O
,	O
calling	O
it	O
an	O
"	O
exciting	O
alternative	O
to	O
joysticks	O
"	O
.	O
</s>
<s>
The	O
2014	O
book	O
Vintage	O
Game	O
Consoles	O
also	O
criticized	O
its	O
accuracy	O
compared	O
to	O
Nintendo	O
and	O
Sega	O
,	O
but	O
says	O
it	O
became	O
collectible	O
as	O
Atari	O
's	O
only	O
light	B-Device
gun	I-Device
.	O
</s>
