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:

Numpad 1: Unlimited Health

Numpad 2: Unlimited Ammo

Numpad 3: Unlimited Items/Throwables

Numpad 4: Unlimited Flashlight

Numpad 5: Easy Encounter Kills

Numpad 6: Super Speed

Numpad 7: Float Mode

Left Arrow: Move Left

Right Arrow: Move Right

Up Arrow: Move Up

Down Arrow: Move Down

Notes:

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

Numpad 2: Unlimited Ammo - toggle on and most weapons have unlimited ammo.

Numpad 3: Unlimited Items/Throwables - toggle on and many items, grenades, missles, and etc. will be unlimited.

Numpad 4: Unlimited Flashlight - toggle on and your flashlight power is unlimited.

Numpad 5: Easy Encounter Kills - some encounters show a health bar for the enemy.  Press this key to reduce the health of the enemy.  May work on some non-boss enemies as well.

Numpad 6: Super Speed - toggle on for faster movement

Numpad 7: Float Mode - toggle on to suspend your character in the air. Useful for moving across distances.  Turn off when not needed.

Left Arrow: Move Left - this forces your character in the direction.  Useful to move into places that are locked, inaccessible, or to quickly get to areas on the map.

Right Arrow: Move Right - this forces your character in the direction.  Useful to move into places that are locked, inaccessible, or to quickly get to areas on the map.

Up Arrow: Move Up - this forces your character in the direction.  Useful to move into places that are locked, inaccessible, or to quickly get to areas on the map.

Down Arrow: Move Down - this forces your character in the direction.  Useful to move into places that are locked, inaccessible, or to quickly get to areas on the map.