<s>
Mystic	B-Application
Marathon	I-Application
is	O
a	O
horizontally	O
scrolling	O
arcade	B-Application
video	I-Application
game	I-Application
released	O
by	O
Williams	O
Electronics	O
in	O
1984	O
.	O
</s>
<s>
Donofrio	O
later	O
worked	O
on	O
Joust	B-Application
2	I-Application
:	I-Application
Survival	I-Application
of	I-Application
the	I-Application
Fittest	I-Application
.	O
</s>
<s>
Three	O
versions	O
were	O
released	O
:	O
one	O
for	O
Defender	B-Application
;	O
one	O
for	O
Joust	B-Application
,	O
Robotron	B-Application
:	I-Application
2084	I-Application
,	O
and	O
Stargate	B-Application
;	O
and	O
one	O
for	O
Bubbles	B-Application
.	O
</s>
<s>
Mystic	B-Application
Marathon	I-Application
was	O
released	O
in	O
the	O
year	O
following	O
the	O
video	O
game	O
crash	O
of	O
1983	O
alongside	O
Turkey	O
Shoot	O
and	O
Inferno	O
,	O
none	O
of	O
which	O
were	O
as	O
successful	O
as	O
earlier	O
games	O
from	O
Williams	O
or	O
ported	O
to	O
contemporary	O
home	O
systems	O
.	O
</s>
<s>
Mystic	B-Application
Marathon	I-Application
was	O
developed	O
by	O
Williams	O
Electronics	O
,	O
with	O
Kristina	O
Donofrio	O
as	O
the	O
lead	O
designer	O
and	O
programmer	O
,	O
Ken	O
Graham	O
as	O
the	O
secondary	O
programmer	O
,	O
with	O
input	O
from	O
Python	O
Anghelo	O
and	O
Noah	O
Falstein	O
.	O
</s>
<s>
Donofrio	O
had	O
previously	O
worked	O
on	O
Williams	O
pinball	O
games	O
as	O
a	O
sound	O
engineer	O
;	O
Graham	O
did	O
additional	O
programming	O
for	O
other	O
Williams	O
games	O
including	O
Sinistar	B-Application
and	O
Bubbles	B-Application
.	O
</s>
<s>
Graham	O
's	O
primary	O
responsibility	O
on	O
Mystic	B-Application
Marathon	I-Application
was	O
to	O
generate	O
the	O
backgrounds	O
and	O
sprites	O
.	O
</s>
<s>
Many	O
obstacles	O
slow	O
the	O
creatures	O
down	O
,	O
including	O
apple-throwing	O
trees	O
,	O
lightning	B-Architecture
,	O
sea	O
monsters	O
,	O
giant	O
clams	O
,	O
and	O
sinkholes	O
.	O
</s>
<s>
In	O
addition	O
to	O
a	O
joystick	B-Device
for	O
movement	O
,	O
there	O
is	O
a	O
jump	O
button	O
.	O
</s>
<s>
When	O
emulated	O
via	O
MAME	B-Device
,	O
the	O
colors	O
are	O
displayed	O
incorrectly	O
.	O
</s>
<s>
The	O
sky	O
and	O
water	O
are	O
shades	O
of	O
blue	O
in	O
the	O
actual	O
game	O
,	O
but	O
magenta	O
and	O
violet	O
under	O
MAME	B-Device
,	O
and	O
the	O
rocks	O
are	O
pink	O
instead	O
of	O
gray	O
.	O
</s>
<s>
Most	O
of	O
the	O
screenshots	O
and	O
video	O
of	O
Mystic	B-Application
Marathon	I-Application
on	O
the	O
web	O
were	O
taken	O
from	O
MAME	B-Device
with	O
incorrect	O
colors	O
.	O
</s>
