Type anywhere in the game:

 mpkfa           - God mode
 mppos           - Show position
 mpfps           - Frame rate
 mpbodyguard     - Invulnerability
 mphighlander    - 99 lives
 mpthewolf       - Jump to the next level
 mpbadmofo       - Jump to the level before
 mpbringthegimp  - Next boss enemy
 mpignition      - All keys
 mpturbocharger  - All spells
 mppetrol        - Health
 mparmorall      - Armor
 mpglovebox      - All weapons
 mpshoes         - 99 souls
 mpironpockets   - Player cannot be robbed
 mpbandaid       - Stopps health countdown
 mplockpick      - Skull key
 mpomar          - Fire shield
 mproadrunner    - More speed
 mpwinturbo      - Super scroll
 mpbadbreath     - Freak artefact
 mpmintybreath   - Worship artefact
 mpbackpassward  - Reversed moving
 mpbishop        - Bishop artefact
 mprook          - Rook artefact
 mpyourit        - YourIt artefact
 mpprojectilejam - ProjectileJam artefact
 mpslomotion     - SlowMotion artefact
 mpthreadsoflife - ThreadsOfLife artefact
 mpboo           - Ghost artefact
 mppoorsport     - Flags save the game