Stuck on the Red Planet? Let IGN Guides help. We've whipped up a guide that covers everything you might come across in this fascist person shooter. From a detailed walkthrough to advanced weapons specs, from vehicle info to character bios, from fighting strategy to secrets and cheats... this guide has it all.

Get the guide here.

To unlock all the normal options, enter TRIANGLE, TRIANGLE, X, X, SQUARE, CIRCLE, SQUARE, CIRCLE.

At the cheat screen, enter SQUARE, CIRCLE, TRIANGLE, CIRCLE, SQUARE, X, TRIANGLE, X.

To play any level, enter this code at the Cheats screen: CIRCLE, SQUARE, X, TRIANGLE, SQUARE, CIRCLE, X, X.

To get Super Health, enter this code at the Cheats screen: X, X, SQUARE, TRIANGLE, SQUARE, TRIANGLE, CIRCLE.

To have unlimited ammo, go to the Cheat screen and enter this code: SQUARE, TRIANGLE, X, CIRCLE, SQUARE, CIRCLE, X, TRIANGLE.

To have unlimited grenades, enter this code at the Cheat screen: CIRCLE, X, CIRCLE, SQUARE, X, CIRCLE, X, CIRCLE.

To unlock rapid rails, go to the Cheat screen and enter this code: CIRCLE, SQUARE, CIRCLE, SQUARE, X, X, TRIANGLE, TRIANGLE.

Remember superballs? To make the grenades behave like that, go to the Cheat screen and enter this code: CIRCLE, CIRCLE, CIRCLE, CIRCLE, CIRCLE, CIRCLE, CIRCLE, CIRCLE.

To show gibby explosions, go to the Cheat screen and enter TRIANGLE, CIRCLE, X, SQUARE, TRIANGLE, CIRCLE, X, SQUARE.

To show gibby bullets, go to the Cheat screen and enter this code: CIRCLE, CIRCLE, CIRCLE, CIRCLE, TRIANGLE, X, CIRCLE, CIRCLE.

To unlock the Director's Cut, go to the Cheats screen and enter this code: SQUARE, X, CIRCLE, TRIANGLE, CIRCLE, X, SQUARE, TRIANGLE.

To make the dead traipse about, go to the Cheats screen and enter this code: X, X, X, X, X, X, X, X.

To see some bizarre death sequences, go to the Cheats screen and enter this code: TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE.

To enable Rain of Fire, go to the Cheats screen and enter: SQUARE, SQUARE, SQUARE, SQUARE, SQUARE, SQUARE, SQUARE, SQUARE.