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 Focus Time

Trainer Options:
NumPad1: Unlimited Health
NumPad2: No Damage
NumPad3: Unlimited Focus Time
NumPad4: Unlimited Jumps
NumPad5: No Reload
NumPad6: Enemy Don't React To Player
NumPad7: Easy Kill Enemies

Editor Options:
Score: Current Score

Notes:

EDITOR OPTIONS

Once you are in the game far enough where your score is displayed, you can edit the value in the editor, then press TAB to lock it in.

Unlimited Health:
Toggle on to fill health back to 100.

No Damage:
Toggle on and most things cannot kill you.

Unlimited Focus Time:
Toggle on and the focus meter remains full.

Unlimited Jumps:
Toggle on and you can jump higher and higher.

No Reload:
Toggle on and most weapons can fire without reloading.

Enemy Don't React To Player:
Toggle on and most enemies will not react to you.  May need to turn off for scripted events.

Easy Kill Enemies:
Toggle on and most enemies are killed instantly.