<s>
Horde3D	B-Operating_System
is	O
an	O
open-source	B-Application
cross-platform	O
graphics	O
engine	O
.	O
</s>
<s>
Its	O
purpose	O
and	O
design	O
is	O
similar	O
to	O
that	O
of	O
OGRE	B-Application
with	O
the	O
primary	O
goal	O
being	O
lightweight	O
for	O
next-generation	O
video	O
games	O
.	O
</s>
<s>
The	O
engine	O
is	O
also	O
compatible	O
with	O
GLFW	B-Language
.	O
</s>
<s>
The	O
engine	O
is	O
primarily	O
designed	O
for	O
an	O
object-oriented	B-Language
approach	O
to	O
scene	O
rendering	O
.	O
</s>
<s>
The	O
engine	O
was	O
originally	O
built	O
on	O
top	O
of	O
OpenGL	B-Application
2.0	O
A	O
plugin	O
to	O
use	O
the	O
engine	O
with	O
the	O
Bullet	B-Application
Physics	I-Application
API	B-Application
also	O
exists	O
.	O
</s>
<s>
The	O
following	O
commercial	O
games	O
use	O
the	O
Horde3D	B-Operating_System
engine	O
:	O
</s>
