<s>
OpenCity	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
software	I-License
3D	O
city-building	B-Application
game	I-Application
started	O
in	O
2003	O
by	O
France-based	O
Vietnamese	O
programmer	O
Duong-Khang	O
Nguyen	O
.	O
</s>
<s>
The	O
game	O
mechanics	O
are	O
similar	O
to	O
Simcity	B-Application
,	O
although	O
the	O
game	O
developers	O
do	O
not	O
strive	O
to	O
make	O
it	O
a	O
direct	O
Simcity	B-Application
clone	O
.	O
</s>
<s>
OpenCity	B-Application
is	O
the	O
product	O
of	O
programmer	O
Duong-Khang	O
Nguyen	O
and	O
3D	O
artist	O
Frédéric	O
Rodrigo	O
.	O
</s>
<s>
Nguyen	O
was	O
inspired	O
by	O
the	O
open	O
source	O
game	O
FreeReign	O
;	O
when	O
he	O
realized	O
that	O
the	O
FreeReign	O
project	O
was	O
abandoned	O
and	O
the	O
source	O
code	O
was	O
not	O
in	O
the	O
condition	O
to	O
be	O
improved	O
,	O
he	O
began	O
development	O
on	O
his	O
own	O
city-building	B-Application
simulator	O
.	O
</s>
<s>
The	O
work	O
in	O
project	O
started	O
in	O
2003	O
with	O
the	O
registration	O
on	O
SourceForge	B-Application
.	O
</s>
<s>
OpenCity	B-Application
is	O
Free	B-License
and	I-License
open-source	I-License
software	I-License
due	O
to	O
the	O
licensing	B-License
as	O
GPLv2	O
.	O
</s>
<s>
OpenCity	B-Application
is	O
built	O
on	O
cross	B-Operating_System
platform	I-Operating_System
libraries	I-Operating_System
and	O
APIs	B-General_Concept
like	O
Simple	B-Operating_System
DirectMedia	I-Operating_System
Library	I-Operating_System
and	O
OpenGL	B-Application
,	O
which	O
allows	O
porting	O
to	O
various	O
OSes	O
and	O
platforms	O
,	O
like	O
Windows	O
,	O
OS	B-Operating_System
X	I-Operating_System
and	O
many	O
Linux	B-Application
distributions	I-Application
.	O
</s>
<s>
OpenCity	B-Application
achieved	O
a	O
broad	O
spread	O
as	O
free	B-License
and	I-License
open-source	I-License
and	O
freeware	B-License
video	O
game	O
,	O
and	O
was	O
downloaded	O
directly	O
from	O
SourceForge	B-Application
between	O
2003	O
and	O
May	O
2017	O
over	O
190,000	O
times	O
according	O
to	O
the	O
SF	O
download	O
statistic	O
.	O
</s>
<s>
OpenCity	B-Application
was	O
also	O
directly	O
integrated	O
in	O
many	O
Linux	B-Application
distributions	I-Application
:	O
Fedora	O
,	O
Debian	O
,	O
Arch	O
Linux	O
,	O
SuSE	O
,	O
Slackware	B-Application
,	O
Ubuntu	B-Operating_System
,	O
Pardus	B-Operating_System
,	O
Frugalware	O
.	O
</s>
<s>
OpenCity	B-Application
has	O
been	O
reviewed	O
as	O
"	O
well	O
made	O
3D	O
remake	O
"	O
of	O
SimCity	B-Application
by	O
Chip.de	O
in	O
2013	O
.	O
</s>
