Doom

IDDQD (god mode)

IDKFA (all weapons,ammo,and keys)

IDFA (all weapons and ammo)

IDSPISPOPD (no clipping mode)

IDCHOPPERS (Chainsaw)

IDMYPOS (get coordinates)

DEVPARM (put system into Developer Mode)

IDCLEV[episode][level] (warps you to desired level)

IDBEHOLDL (light amplification gogles)

IDBEHOLDS (berserk strenght)

IDBEHOLDI (invincibility)

IDBEHOLDM or IDBEHOLDA (computer map)

IDBEHOLDR (radiation suit)

IDBEHOLDV (invisibility)

(on the map)=>IDDT (shows the whold map),IDDT (shows all items),IDDT (reset to normal)