A.R.O.G(2008)

Commander Logar escapes from the planet G.O.R.A. to Earth and finds Arif. Arif gets tricked by the evil Commander Logar into thinking that his intentions have changed but Commander Logar sends Arif 1.000.000 years into the past. After finding himself in the stone age, Arif begins to help the local tribe to defend themselves against a different, much more violent tribe and tries to find a way back to his time.

Official site