Blood II 

MPGOD - god mode
MPKFA - all weapons and all ammo
MPAMMO - restore all ammo
MPCLIP - ghost mode, fly and no clip
MPHEALTHY - restores all health to 100
MPWHEREAMI - displays your coordinates
MPHIDEME - ?
MPBEEFCAKE - increased power (more gore and blood)
MPKILLEMALL - kill all enemies on level
MPSPEEDUP - increases your speed (1...5)
MPSTRONGER - increases your strength (1...5)
MPCALEB - change your character model to caleb
MPOPHELIA - change your charcter model to ophelia
MPISHMAEL - change your character to model ishmael
MPGABBY - change your character model to gabriel
MPTHEORB - the orb
MPLIFELEECH - Life Leech
MPGOBLE - brian.l goble is a programming god
MPSCORPIO - ?
MPTOTARO - jim totaro is the man!
MPSUPERZUG - ?
MPGOSHOPPING - gives all items
MPNICENURSE - gives +25 health
MPVERYNICENURSE gives +300 health
MPWARD - gives ward (25 armour)
MPNEWCROWARD - gives newcroward (100 armour)
MPCARBONFIBER - gives willpower powerup
MPTAKEOFFSHOES - invisible
MPHEREKERMUR - gives triple damage powerup
MPBEANSOFFCOOLNESS - gives a nice selection of weapons with their
ammo