Activating this trainer

If not state otherwise below, press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Trainer Options

# Player 
     NumPad1: Unlimited Health
     NumPad2: Unlimited Stamina
     NumPad3: Unlimited Energy

# Weapons 
     NumPad4: Unlimited Ammo
     NumPad5: No Reload

# Items 
     NumPad6: Unlimited Health Syringes
     NumPad7: Unlimited Use Keys

# Gameplay 
     NumPad8: Game Speed

Notes

Unlimited Use Keys:
If you have one, when you use it, you will not decrease the amount you have.