Press the tilde (~) and enter the codes:
Kreed: The World Beyond – Cheat Codes Free Download
g_fly 1-fly
g_fly 0-don’t fly
gotoroom roomXX – get into the room with number XX (for example, gotoroom room01 or gotoroom room12)
cl_showinfo 1- shows fps
cl_showinfo 0- removes fps
hitpoints 10000- becomes 10000 lives
ant_Ti