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: Invulnerable 
     NumPad2: Unlimited Health
     NumPad3: Unlimited Armor
     NumPad4: No Reload
     NumPad5: Super Damage
     NumPad6: Unlimited Currency 1
     NumPad7: Unlimited Currency 2
     NumPad8: Unlimited Payback Meter
     NumPad9: Increase Player Speed
     Multiply: Decrease Player Speed
     Add: Set Normal Player Speed

# Enemy  
     Subtract: Decrease Enemy Speed
     Decimal: Increase Enemy Speed
     Divide: Freeze Enemies

Editor Options

# Game  
     Game Speed

# Player 
     Currency 1
     Currency 2
     Damage Multiplier
     Move Speed Multiplier

# Enemy 
     Move Speed Multiplier

Notes

Currency option will start functioning one you receive currencies by the game.

Unlimited Payback Meter:
Note that Payback on screen might show empty but that's just visual and you can use the Payback ability as much as you like to.