Numpad 1: Unlimited Health - keeps your health near 100%.
Numpad 2: Unlimited Ammo - keeps your pepper grinder from overheating.
Numpad 3: Super Speed - your character moves quicker.
Numpad 4: Add Teeth- adds 100 teeth to your character.
Numpad 5: Save Position - save current physical postion.
Numpad 6: Teleport - teleport to saved position.
Numpad 7: Undo Teleport - undo teleport.
Numpad 8: Float Up - while Alice is floating, hold this key down to float Alice even higher. You can use this to get into positions otherwise impossible or to make long jumps much easier.
Numpad 9: Death Pulse - press this key and any NPC's around Alice, including most enemies, will take massive damage. Most of them will be able to be killed with one swing or one shot. You can use this each time you encounter more enemies or groups of enemies.