While playing, press [CTRL] + [ALT] + [~] (tilde) to bring up the console, then type any of the following codes:
cmd godmode: God Mode
cmd noclip: No Clipping
cmd giveall: All Weapons/Items
cmd selfsummon: Spawn Another Riddick
cmd kill: Suicide
cmd cyclecamera: Switch 1st/3rd Person View
unlock all: Unlock All Director's Cut Special Features
map #: Load Map (#=Name)
Note: On the MAP command, use the names from the Install Directory\Content\Worlds.