Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.
Numpad 1: Unlimited Health
Numpad 2: Unlimited Ammo
Numpad 3: No Reload
Numpad 4: God Mode
Numpad 5: Set Medkits
Please note that the trainer will not save you from missed QSE events where you will die if you do not press the right keys or motions with mouse or from scripted deaths.
Numpad 1: Unlimited Health - Toggle on and the trainer will attempt to keep your health at 100%.
Numpad 2: Unlimited Ammo - toggle on and the trainer will try to keep most weapons ammo at very high.
Numpad 3: No Reload - toggle on and the trainer will try to keep most weapons, throwables, and some items to very high such that you don't need to reload or regather items such as grenades, etc.
Numpad 4: God Mode - toggle on and most things cannot harm you, and may protect you in vehicles, etc.
Numpad 5: Set Medkits - press to give you medkits.
Unlock more trainer options including updates from here - Call of Duty: WWII Trainer