Unlock the following cheats in Single-Player mode by completing the corresponding tasks:
Fiery Death(enemies disintegrate) - Earn the "Secret Master" achievement by finding all secrets in all single player missions. When this cheat is activated, enemies die as if they were killed by a charged shot.
Fully Stocked(infinite ammo) - Earn the "Annihilator Award" achievement by killing 1,000 enemies.
Stopping Power(one-shot kills) - Earn the "Campaign Award" achievement by completing all single player missions.