Cheats
Use the Trainer above or press [Left Shift]+F11 to activate the cheat window and type in these codes:

Code - Result:

TIMELESS - Stop Time
FIDEL CASTRO - View dialogues
MEDIC - Toggle hint display
EPITAPH - Toggle victory condition display
WHATS MY DESTINY - Toggle short briefings display
BEHIND THE ENEMY HORSE - Able to sneak behind enemies
POWERMAN - New Weapon
SHOW ME ALL - Show all objects
SCHNEIDER - End current level (crashes the game when Mia is not in your team)
JACKAL - Ammunition (crashes the game when Doc is not in your team)
HOLLOW MAN - Toggle invisibility
ZEUS - Toggle help from the Gods (click the flashlight and point it at the enemy)
CLINT - Win mission
SUPERSONIC - Toggle noise display (White circles: Noises, Black circles: Noises that cannot be heard)