<s>
Zyll	B-Application
is	O
a	O
text-based	O
role-playing	O
video	O
game	O
published	O
by	O
IBM	O
for	O
the	O
IBM	B-Device
PCjr	I-Device
in	O
1984	B-Application
.	O
</s>
<s>
The	O
story	O
begins	O
in	O
the	O
"	O
Land	O
of	O
Magic	O
and	O
Enchantment	O
"	O
where	O
a	O
young	O
man	O
named	O
Zyll	B-Application
was	O
unsuccessfully	O
attempting	O
to	O
become	O
a	O
master	O
of	O
black	O
magic	O
.	O
</s>
<s>
After	O
banishment	O
,	O
Zyll	B-Application
accidentally	O
discovered	O
the	O
magical	O
"	O
Black	O
Orb	O
"	O
upon	O
throwing	O
a	O
failed	O
potion	O
to	O
the	O
ground	O
.	O
</s>
<s>
Zyll	B-Application
used	O
his	O
newfound	O
powers	O
to	O
take	O
revenge	O
against	O
the	O
Land	O
of	O
Magic	O
and	O
Enchantment	O
by	O
stealing	O
the	O
"	O
Great	O
Treasures	O
"	O
that	O
had	O
been	O
hidden	O
in	O
secret	O
vaults	O
for	O
many	O
years	O
.	O
</s>
<s>
Players	O
are	O
given	O
the	O
role	O
of	O
a	O
daring	O
adventurer	O
who	O
has	O
decided	O
to	O
steal	O
the	O
Black	O
Orb	O
from	O
Zyll	B-Application
in	O
order	O
to	O
return	O
the	O
Land	O
of	O
Magic	O
and	O
Enchantment	O
to	O
its	O
previous	O
splendor	O
.	O
</s>
<s>
Game-play	O
begins	O
with	O
the	O
player	O
being	O
transported	O
to	O
Zyll	B-Application
's	O
home	O
,	O
the	O
Castle	O
Mitain	O
.	O
</s>
<s>
The	O
goal	O
of	O
Zyll	B-Application
is	O
to	O
find	O
the	O
Black	O
Orb	O
,	O
which	O
the	O
evil	O
sorcerer	O
Zyll	B-Application
used	O
to	O
destroy	O
the	O
primary	O
character	O
's	O
homeland	O
.	O
</s>
<s>
The	O
game	O
has	O
a	O
two-player	O
mode	O
allowing	O
players	O
to	O
work	O
cooperatively	O
or	O
competitively	O
;	O
each	O
player	O
uses	O
half	O
of	O
the	O
keyboard	B-Device
for	O
their	O
commands	O
.	O
</s>
<s>
Zyll	B-Application
has	O
a	O
function	B-Application
key	I-Application
interface	O
based	O
on	O
the	O
arrangement	O
of	O
the	O
keys	O
on	O
a	O
PC/XT	B-Device
keyboard	B-Device
.	O
</s>
<s>
In	O
the	O
same	O
year	O
of	O
Zyll	B-Application
's	O
release	O
,	O
IBM	O
released	O
new	O
AT	B-Device
keyboards	I-Device
which	O
moved	O
the	O
function	B-Application
keys	I-Application
to	O
the	O
top	O
of	O
the	O
keyboard	B-Device
.	O
</s>
<s>
Within	O
the	O
game	O
,	O
one	O
can	O
switch	O
to	O
the	O
AT	B-Device
keyboard	I-Device
layout	O
by	O
pressing	O
Alt-K	O
.	O
</s>
