Press "T" for Talk then type:

MPGOD - Godmode
MPKFA - Full Ammo, Armor, and Health
MPHEALTH - Full Health
MPAMMO - Full Ammo
MPARMOR - Full Armor
MPCLIP - Clipping Mode on/off
MPPOS - Show Position on/off
MPCAMERA - Adjust Camera on/off
MPLIGHTSCAPE - Adjust Light Scape on/off
MPMECH - Change mech
MPANIME - Changes Explosions to Japanese Anime
MPTEARS - Unlimited Ammo

m. niebuhr & Miki & Thomas Ocampo