<s>
Unknown	B-Application
Horizons	I-Application
is	O
a	O
city-building	B-Application
game	I-Application
and	O
real-time	O
strategy	O
game	O
,	O
inspired	O
by	O
the	O
Anno	O
series	O
.	O
</s>
<s>
It	O
is	O
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPLv2	O
)	O
and	O
is	O
therefore	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
software	I-Application
.	O
</s>
<s>
Unknown	B-Application
Horizons	I-Application
originated	O
in	O
the	O
OpenAnno	O
project	O
from	O
2005	O
which	O
aimed	O
for	O
being	O
a	O
clone	O
of	O
Anno	B-Application
1602	I-Application
.	O
</s>
<s>
The	O
project	O
uses	O
Flexible	O
Isometric	O
Free	O
Engine	O
(	O
FIFE	O
)	O
as	O
game	O
engine	O
and	O
features	O
isometric	B-Application
2D	I-Application
graphics	I-Application
.	O
</s>
<s>
Since	O
FIFE	O
also	O
is	O
in	O
development	O
stage	O
and	O
Unknown	B-Application
Horizons	I-Application
is	O
the	O
first	O
major	O
project	O
based	O
on	O
this	O
engine	O
,	O
the	O
developers	O
of	O
Unknown	B-Application
Horizons	I-Application
have	O
agreed	O
to	O
help	O
with	O
development	O
on	O
FIFE	O
.	O
</s>
<s>
Python	B-Language
was	O
chosen	O
as	O
the	O
language	O
for	O
this	O
project	O
because	O
it	O
is	O
the	O
language	O
best	O
supported	O
by	O
FIFE	O
,	O
guarantees	O
cross-platform	B-Operating_System
compatibility	O
,	O
and	O
allows	O
rapid	O
development	O
.	O
</s>
<s>
The	O
models	O
for	O
Unknown	B-Application
Horizons	I-Application
are	O
created	O
using	O
Blender	B-Application
and	O
then	O
rendered	O
in	O
four	O
rotations	O
(	O
eight	O
for	O
units	O
)	O
.	O
</s>
<s>
Next	O
major	O
steps	O
in	O
development	O
include	O
usability	B-Application
improvements	O
and	O
an	O
island	O
editor	O
.	O
</s>
<s>
In	O
2009	O
the	O
project	O
was	O
renamed	O
from	O
OpenAnno	O
to	O
Unknown	B-Application
Horizons	I-Application
.	O
</s>
<s>
Unknown	B-Application
Horizons	I-Application
took	O
part	O
at	O
the	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
2011	O
as	O
a	O
mentoring	O
organization	O
and	O
participated	O
again	O
in	O
2012	O
.	O
</s>
<s>
In	O
2019	O
,	O
the	O
project	O
moved	O
the	O
codebase	O
from	O
Python	B-Language
2	O
to	O
Python	B-Language
3	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
developers	O
asked	O
for	O
assistance	O
with	O
porting	O
to	O
the	O
Godot	B-Application
game	O
engine	O
due	O
to	O
concerns	O
that	O
FIFE	O
was	O
no	O
longer	O
in	O
active	O
development	O
.	O
</s>
<s>
A	O
separate	O
GitHub	B-Application
repository	O
was	O
opened	O
to	O
manage	O
the	O
new	O
codebase	O
.	O
</s>
<s>
Unknown	B-Application
Horizons	I-Application
was	O
selected	O
in	O
October	O
2011	O
as	O
"	O
HotPick	O
"	O
by	O
Linux	B-Application
Format	O
.	O
</s>
<s>
Despite	O
its	O
alpha	O
state	O
,	O
Unknown	B-Application
Horizons	I-Application
already	O
appeared	O
in	O
issue	O
24/09	O
of	O
the	O
German	O
c't	O
computer	O
magazine	O
,	O
as	O
a	O
part	O
of	O
the	O
Heise	O
software	O
collection	O
6/09	O
.	O
</s>
<s>
Between	O
2009	O
and	O
2016	O
Unknown	B-Application
Horizons	I-Application
was	O
downloaded	O
from	O
SourceForge	B-Application
alone	O
250,000	O
times	O
.	O
</s>
