Cheats:

At the main menu, hold both triggers and press Left, Up, Down, A, Right, B, Start. This will bring up the code entry screen. Now enter the following cheats.

SUPERMECH

WHERESMAX

WEWILLWIN

MULTIMAYHEM

SPACEFOLD

MARSBASE

MIRIYA

BACKSTABBER

SNIPER

MISSMACROSS

FLIPSIDE

CLEAR

Invincibility

All models are awards

Level select

All multiplayer levels

Gunpod refresh faster

Missiles refresh faster

Gunpod and missiles refresh faster

One shot kills

One shot sniper kills

All paint schemes

Upside down mode

Turn off codes

Invincibility:

Go into Training mode, pick the Veritech Fighter training, shoot down only the first two targets, then quit the game. Now go into Story mode and you'll be indestructible no matter the stage or style of fighter that you choose.