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 3: Unlimited Ranged Ammo

Options:

Numpad 1: Unlimited Health

Numpad 2: 5000 Items

Numpad 3: Unlimited Ranged Ammo

Numpad 4: Unlimited Bombs

Notes:

Numpad 1: Unlimited Health - toggle on while moving around in the game for massive health.

Numpad 2: 5000 Items - open the Inventory and click BAGS then toggle this on. Leave the Inventory and come back and all items in the BAGS are 5000.

Numpad 3: Unlimited Ranged Ammo - shoot a ranged weapon then toggle this on and from then on you have unlimited ammo.

Numpad 4: Unlimited Bombs - drop a bomb and then toggle this on and from then on you have unlimited bombs.