<s>
A	O
zero-player	B-General_Concept
game	I-General_Concept
or	O
no-player	O
game	O
is	O
a	O
simulation	B-Application
game	O
that	O
has	O
no	O
sentient	O
players	O
.	O
</s>
<s>
A	O
game	O
that	O
evolves	O
as	O
determined	O
by	O
its	O
initial	O
state	O
,	O
requiring	O
no	O
further	O
input	O
from	O
humans	O
is	O
considered	O
a	O
zero-player	B-General_Concept
game	I-General_Concept
.	O
</s>
<s>
Progress	B-Protocol
Quest	I-Protocol
is	O
another	O
example	O
,	O
in	O
the	O
game	O
the	O
player	O
sets	O
up	O
an	O
artificial	O
character	O
,	O
and	O
afterwards	O
the	O
game	O
plays	O
itself	O
with	O
no	O
further	O
input	O
from	O
the	O
player	O
.	O
</s>
<s>
Godville	B-Application
is	O
a	O
similar	O
game	O
that	O
took	O
inspiration	O
from	O
Progress	B-Protocol
Quest	I-Protocol
,	O
in	O
the	O
game	O
the	O
player	O
is	O
a	O
god	O
that	O
can	O
communicate	O
with	O
a	O
non-player	O
character	O
hero	O
,	O
however	O
the	O
game	O
can	O
progress	O
with	O
no	O
interaction	O
from	O
the	O
player	O
.	O
</s>
<s>
Incremental	B-Application
games	I-Application
,	O
sometimes	O
called	O
idle	B-Application
games	I-Application
,	O
are	O
games	O
which	O
do	O
require	O
some	O
player	O
intervention	O
near	O
the	O
beginning	O
however	O
may	O
be	O
zero-player	O
at	O
higher	O
levels	O
.	O
</s>
<s>
As	O
an	O
example	O
,	O
Cookie	B-Application
Clicker	I-Application
requires	O
that	O
players	O
click	O
cookies	O
manually	O
before	O
purchasing	O
assets	O
to	O
click	O
cookies	O
in	O
the	O
place	O
of	O
the	O
player	O
independently	O
.	O
</s>
<s>
In	O
computer	O
games	O
,	O
the	O
term	O
refers	O
to	O
programs	O
that	O
use	O
artificial	B-Application
intelligence	I-Application
rather	O
than	O
human	O
players	O
,	O
for	O
example	O
some	O
fighting	O
and	O
real-time	O
strategy	O
games	O
can	O
be	O
put	O
into	O
zero-player	O
mode	O
where	O
multiple	O
AIs	B-Application
can	O
play	O
against	O
each	O
other	O
.	O
</s>
<s>
Humans	O
may	O
have	O
a	O
challenge	O
in	O
designing	O
the	O
AI	B-Application
and	O
giving	O
it	O
sufficient	O
skill	O
to	O
play	O
the	O
game	O
well	O
,	O
but	O
the	O
actual	O
evolution	O
of	O
the	O
game	O
has	O
no	O
human	O
intervention	O
.	O
</s>
