In the menu choose

 Enable Console Select Video/Audio Menu/Advanced Options and check console.
 Now start the game and press [~] to open the the console. Here you might
 type in:

 god           God mode
 notarget      Enemies cannot see you and don't attack you
 noclip        Walk through walls
 give all      Everything maxed out
 health 100    Health complete
 eventlist     Commands listing
 map #         Jump to map # where # might be

               fakkhouse        - Julie's House
               training         - Julie's training area
               homes1           - Eden Homes
               landersroost     - Landers Roost
               creeperpens      - Creeper Pens
               homes2good       - Eden Marketplace
               towncenter_good  - Town Center
               under            - Eden Underground
               over             - Eden Underground 2
               shield           - Eden Shield Generator
               home2evil        - Eden Market under siege!
               otto             - Otto's Shop
               towncenter_evil  - Towncenter Attacked!
               cliff1           - Outskirts of Eden
               cliff2           - Eden Cliffside
               swamp1           - Mooagly Swamps
               swamp2           - Deep Mooagly Swamps
               swamp3           - Swamps confrontation
               gruff            - Billy Goats Gruff
               cemetery         - We Cemetery
               fog              - The Wind of Spirit
               water            - The water of Purity
               blood            - The Sanctity of Blood
               oracleway        - The Bridge of reason
               oracle           - Tomb of the WE

 spawn #       Create an item where # might be

               ammo_flashbangs.tik
               ammo_gascan.tik
               ammo_gasplant.tik
               ammo_gunclip.tik
               ammo_meteor.tik
               ammo_plasma.tik
               ammo_rockets.tik
               ammo_shell.tik
               ammo_uziclip.tik
               ammo_bolt.tik
               ammo_rock.tik
               armor_armguard.tik
               armor_kneepad.tik
               armor_shoulderpad.tik
               item_bighealthfruit1.tik
               item_healthfruit1.tik
               item_healthmush.tik
               item_healthplant.tik
               item_healthvial.tik
               item_bigwaterampoule.tik
               item_waterampoule.tik
               item_edenwater.tik
               item_watervial.tik
               item_cop.tik
               item_crystalshard.tik
               item_dagger.tik
               item_detonator.tik
               item_fogjewel.tik
               item_bloodshgliek.tik
               item_heart.tik
               item_orb.tik
               item_swordcrystal_blue.tik
               item_swordcrystal_red.tik
               item_tikismall.tik
               item_tyleramp.tik
               weapon_axe.tik
               weapon_cbow.tik
               weapon_chaingun.tik
               weapon_chainsword.tik
               weapon_elecsword.tik
               weapon_firesword.tik
               weapon_flamethrower.tik
               weapon_flamethrowergas.tik
               weapon_flashbang.tik
               weapon_gun.tik
               weapon_horn.tik
               weapon_hornofconjuring.tik
               weapon_largeshield.tik
               weapon_lightsword.tik
               weapon_rlauncher.tik
               weapon_shotgun.tik
               weapon_sling.tik
               weapon_sling_asteroid.tik
               weapon_sling_gas.tik
               weapon_smallshield.tik
               weapon_soul.tik
               weapon_soulsucker.tik
               weapon_uzi.tik
               weapon_2uzis.tik
               weapon_dualuzi.tik
               claw.tik
               creeper.tik
               gasyerass.tik
               ghost.tik
               grawlix.tik
               harvester.tik
               horde.tik
               lympthorn_f.tik
               lympthorn_m.tik
               recruiter.tik
               seasnake.tik
               shgliek.tik
               shgliek_evil.tik
               suckblow.tik
               tyler.tik
               vmama.tik