Courtesy of: The Dirty Little Helper Homepage

 Type these in the console:
 (Note: some of these cheats only work in v1.09)

 god              - Godmode ON/OFF
 noclip           - Noclipping ON/OFF
 notarget         - Enemys don+t recognice you ON/OFF
 skill #          - Changes skill level (0-3)
 map X            - Changes level on client (X-Level Name)
                    -> see table 01 (level names)
 changelevel X    - Changes level on server (X-Level Name)
                    -> see table 01 (level names)
 playerclass #    - Changes player class (1-4)
 restart          - Restarts the level
 name X           - Changes your name (X-New Name)
 give h X         - Gives health (X-Ammount of health. Maximum 999)
 give 2           - Gives weapon 2
 give 3           - Gives weapon 3
 give 4           - Gives weapon 4
 developer x      - Developer mode
 impulse 9        - All Weapons/Mana
 impulse 10       - Change Weapon
 impulse 11       - Serverflags command
 impulse 12       - Cycle weapons in reverse order
 impulse 13       - Lift Object
 impulse 14       - Gives you a Sheep
 impulse 23       - Use selected inventory item
 impulse 25       - Gives you Tome of Power
 impulse 32       - Panic button - activates all objects
 impulse 33       - Switch to an other friendly player+s view in coop
 impulse 35       - Remove monsters
 impulse 36       - Freeze monsters
 impulse 37       - Unfreeze monsters
 impulse 39       - Flying on/off
 impulse 40       - Level cheat (Increases your level by one)
 impulse 41       - Experience cheat (Increases your experience points)
 impulse 42       - Coordinates, etc. (only in developer mode)
 impulse 43       - All Weapons/Mana/Items
 impulse 44       - Throws an Item
 impulse 99       - Kills client
 impulse 100      - Uses the Torch
 impulse 101      - Uses the Quartz Flask
 impulse 102      - Uses the Mystic Urn
 impulse 103      - Uses the Krater
 impulse 104      - Uses the Chaos Device
 impulse 105      - Uses the Tome of Tower
 impulse 106      - Uses the Summon stn
 impulse 107      - Uses the Invisibility
 impulse 108      - Uses the Glyph
 impulse 109      - Uses the Boots
 impulse 110      - Uses the Repulsion
 impulse 111      - Uses the No Peep
 impulse 112      - Uses the Ring Of Flight
 impulse 113      - Uses the Force Cube
 impulse 114      - Uses the Icon Defn
 impulse 149      - Display serverflags (only in developer mode)
 impulse 171      - Change class to Paladin
 impulse 172      - Change class to Crusader
 impulse 173      - Change class to Necromancer
 impulse 174      - Change class to Assassin
 impulse 254      - Tells you the King of the Hill
 impulse 255      - Fraglist
 impulse 299      - 20 of each artifact
 chase_active 1   - Chase Mode (Camera)
 chase_up #       - Set camera position
 chase_left #     - Set camera position

Table 01 (level names):
  demo1     Blackmarsh
  demo2     Barbican
  demo3     The Mill
  village1  King+s Court
  village2  Inner Courtyard
  village3  Stables
  village4  Palace Entrance
  village5  The Forgotten Chapel
  rider1a   Famine+s Domain
  meso2     Plaza of the Sun
  meso1     The Palace of Columns
  meso3     Square of the Stream
  meso4     Tomb of the High Priest
  meso5     Obelisk of the Moon
  meso6     Court of 1000 Warriors
  meso8     Bridge of Stars
  meso9     Well of Souls
  egypt1    Temple of Horus
  egypt2    Ancient Temple of Nefertum
  egypt3    Temple of Nefertum
  egypt4    Palace of the Pharaoh
  egypt5    Pyramid of Anubis
  egypt6    Temple of Light
  egypt7    Shrine of Naos
  rider2c   Pestilence+s Lair
  romeric1  The Hall of Heroes
  romeric2  Gardens of Athena
  romeric3  Forum of Zeus
  romeric4  Baths of Demetrius
  romeric5  Temple of Mars
  romeric6  Coliseum of War
  romeric7  Reflecting Pool
  cath      Cathedral
  tower     Tower of the Dark Mage
  castle4   The Underhalls
  castle5   Eidolon+s Ordeal
  eidolon   Eidolon+s Lair
  ravdm1    Atrium of Immolation
  ravdm2    Total Carnage
  ravdm3    Reckless Abandon
  ravdm4    Temple of RA
  ravdm5    Tom FooleryDemo

Comments:
 If x is a 1 so the feature will be enabled, if it is 0 the feature
 will be deactivated. For # there can be any number.