Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.
NumPad1: Infinite Health
NumPad2: Easy Kills
NumPad3: Change Sparks By 500
NumPad4: Instant Level 20
Easy Kills: While active most enemies are killed by a single hit.
Change Sparks: Press hotkey to add more.
Instant Level 20: While active the next exp you get will boost your character to level 20 including all skill points.