please help me find a game that I've been looking for?

[Mario S]

a few years back i played this game that my friend owned but i can remember the name of it and i can only remember some of the game but i really want to play it again so heres a description of the game as far as i can remember you were a giant robot that could walk through a desert landscape you could customize your robot it could temporally fly and carried a few weapons which were customizable sorry but this is all i can remember all i know i i really like to play it so i want to find it get it and play it again some one please help me