I don't know if anyone has or remebers this game but it is kind of like the Dust Universe. It was available on PS2 and features walking tanks and units to support those tanks. The game got kind of minotinous after awhile, but I was talking to guy the other day and he had reminded me of this game and how much like Dust it was. If you still have a PS2 or a backwards compatable PS3 I would definatly check it out.

Will see if I can find a copy!