Here our installing directions

requirements:
ogre-1.4.5
ois-1.0
cegui-0.5.0b
enet-1.1
boost-1.34.1
cmake-2.4.7
openal-0.0.8
freealut-1.1.0
libvorbis-1.2.0
(all named version were tested. lower version requirement may be possible)

It is assumed, that you have a working graphical environment (i.e X11), including some sort of 3d acceleration (OpenGL, Direct3D)

Further information about installing and running this application can be found on http://www.orxonox.net/wiki/Running