How many destroy all humans games are there?

Theirs 1 game of Destroy All Humans.Destroy All Humans! Path of the Furon(Xbox 360 and PS3 in Europe, but in USA only on Xbox 360).

Theirs about 4 games in the destroy all humans series. First two in PS2 and Xbox(original) and the third is big willy unleashed on the WII and the final path of the furon and on consoles on top this answer.