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.

Promo Options
NumPad3: Unlimited Stamina or Lung Breath
NumPad6: Unlimited Ammo
Multiply: No Recoil
Divide: Game Speed

Trainer Options
# Player 
     NumPad1: Unlimited Health
     NumPad2: Ghost Mode
     NumPad3: Unlimited Stamina or Lung Breath
     NumPad4: Fast Skill Cooldowns

# Weapons 
     NumPad5: Super Damage
     NumPad6: Unlimited Ammo
     NumPad7: Unlimited Special Ammo
     NumPad8: No Reload
     NumPad9: Perfect Aim
     Multiply: No Recoil

# Items 
     Add: Unlimited Grenades Medkits Mines Items

# Enemies 
     Subtract: Zombies Don't Attack

# Upgrades 
     Decimal: Unlimited Upgrade Kits
     Divide: Easy Upgrade Weapons

# Gameplay 
     F1: Game Speed

Editor Options
# Score 
     Current Score

# Boost 
     Current Boost Level 
     Current Boost Max Time

# Waves 
     Current Wave
     Current Wave Timer

Notes
Unlimited Stamina or Lung Breath:
Toggle on for unlimited stamina.

Unlimited Ammo:
Toggle on and most weapons have unlimited ammo when you reload.

No Recoil:
For many weapons, there is no recoil when you fire the weapon.

Game Speed:
Toggle on to affect game speed.