<s>
C-evo	B-Application
is	O
a	O
free	O
turn-based	O
strategy	O
computer	O
game	O
whose	O
source	O
code	O
is	O
in	O
the	O
public	O
domain	O
by	O
German	O
developer	O
Steffen	B-Application
Gerlach	I-Application
,	O
its	O
programmer	O
and	O
designer	O
,	O
making	O
the	O
game	O
freeware	B-License
.	O
</s>
<s>
C-evo	B-Application
is	O
an	O
empire	B-Application
building	I-Application
game	I-Application
based	O
on	O
Civilization	B-Application
II	I-Application
,	O
but	O
with	O
a	O
different	O
focus	O
;	O
it	O
aims	O
to	O
be	O
a	O
pure	O
"	O
game	O
"	O
with	O
all	O
players	O
playing	O
to	O
win	O
,	O
rather	O
than	O
the	O
more	O
simulationist	O
side	O
of	O
the	O
Civilization	O
series	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
it	O
is	O
known	O
for	O
tough	O
and	O
uncompromising	O
artificial	B-Application
intelligence	I-Application
computer	O
opponents	O
;	O
some	O
of	O
these	O
AIs	B-Application
have	O
been	O
contributed	O
by	O
the	O
player	O
base	O
and	O
are	O
separately	O
downloadable	O
.	O
</s>
<s>
C-evo	B-Application
is	O
an	O
empire	B-Application
building	I-Application
game	I-Application
,	O
dealing	O
with	O
the	O
history	O
of	O
humans	O
from	O
antiquity	O
into	O
the	O
future	O
.	O
</s>
<s>
The	O
setup	O
allows	O
the	O
player	O
to	O
either	O
choose	O
a	O
map	O
or	O
supply	O
size	O
and	O
ocean-to-land	O
ratio	O
to	O
have	O
one	O
generated	O
randomly	O
,	O
and	O
to	O
choose	O
how	O
many	O
(	O
1	O
to	O
15	O
)	O
tribes	O
–	O
also	O
called	O
nations	O
–	O
will	O
populate	O
it	O
when	O
the	O
game	O
starts	O
,	O
as	O
well	O
as	O
which	O
intelligence	O
will	O
control	O
each	O
tribe	O
during	O
the	O
game	O
–	O
that	O
is	O
,	O
either	O
a	O
human	O
player	O
or	O
any	O
artificial	B-Application
intelligence	I-Application
such	O
as	O
Gerlach	O
's	O
default	O
AI	B-Application
that	O
is	O
included	O
with	O
the	O
game	O
;	O
alternative	O
AIs	B-Application
have	O
been	O
designed	O
and	O
contributed	O
by	O
other	O
programmers	O
.	O
</s>
<s>
A	O
supervisor	O
mode	O
allows	O
games	O
where	O
all	O
tribes	O
are	O
controlled	O
by	O
artificial	B-Application
intelligence	I-Application
.	I-Application
</s>
<s>
On	O
the	O
C-evo	B-Application
webpage	O
,	O
the	O
game	O
,	O
its	O
source	O
code	O
,	O
AI	B-Application
modules	O
,	O
graphics	O
,	O
and	O
player	O
contributions	O
such	O
as	O
many	O
additional	O
nations	O
,	O
maps	O
,	O
mods	O
,	O
and	O
utilities	O
are	O
available	O
.	O
</s>
<s>
The	O
documentation	O
of	O
the	O
AI	B-Application
's	O
DLL-interface	O
is	O
available	O
from	O
the	O
project	O
homepage	O
.	O
</s>
<s>
There	O
is	O
also	O
an	O
AI	B-Application
development	O
kit	O
,	O
available	O
in	O
C#	B-Application
since	O
version	O
1.1.2	O
,	O
in	O
Delphi	B-Language
,	O
and	O
in	O
C++	B-Language
.	O
</s>
<s>
The	O
C#	B-Application
kit	O
is	O
included	O
with	O
the	O
game	O
,	O
as	O
is	O
a	O
map	O
editor	O
.	O
</s>
<s>
At	O
the	O
2005	O
International	O
Joint	O
Conference	O
on	O
Artificial	B-Application
Intelligence	I-Application
,	O
Rubén	O
Sánchez-Pelegrín	O
and	O
Belén	O
Díaz-Agudo	O
presented	O
a	O
paper	O
entitled	O
"	O
An	O
Intelligent	O
Decision	O
Module	O
based	O
on	O
CBR	O
for	O
C-evo	B-Application
"	O
,	O
which	O
discusses	O
using	O
C-evo	B-Application
as	O
a	O
platform	O
to	O
perform	O
artificial	B-Application
intelligence	I-Application
research	I-Application
.	O
</s>
