Using this Trainer:

Launch the trainer first, then launch the Game and then Press F1 at the Main Menu.

Listen for "Activated".

Press desired option key

Options in Promo:

Numpad 2: Unlimited Ammo

Options:

Numpad 1: Unlimited Health

Numpad 2: Unlimited Ammo

Numpad 3: No Reload

Numpad 4: Fast Level Up

Notes:

Numpad 1: Unlimited Health - toggle on and most things cannot kill you

Numpad 2: Unlimited Ammo - toggle on and your ammo will not deplete when reloading.

Numpad 3: No Reload - toggle on and many weapons fire without needing reload.

Numpad 4: Fast Level Up - toggle on and your EXP increases faster.