To use any of the following codes hit the ~ key to bring up the console, then type in any cheat you wish.:

meatwagon = kills every monster in level but bosses
victor = kill all monsters and bosses
playbetter = turns on godmode
weapnext = select next weapon
weap prev = select previous weapon
kiwi = turns clipping on and off
twoweeks = activates powerup
showcoords = gives you your coordinates
angermonsters = makes monsters angry (they frenzy!)
Item codes, type in the following odes to get their specific item.
item_firewall
item_weapon_sphereofannihilation
item_weapon_phoenixbow
item_weapon_maceballs
item_weapon_magicmissile
item_weapon_redrain_bow
item_health_fullitem_health_half
item_defense_ringofrepulsion
item_defense_shield
item_defense_teleport
item_defense_meteorbarrier
item_defense_polymorph
item_defense_powerup
item_puzzle_slumcontainer
item_puzzle_tavernkey
item_puzzle_tome item_puzzle_townkey
item_puzzle_highpriestesskey
item_puzzle_highpriestesssymbol
item_puzzle_hive2amulet
item_puzzle_hive2gem
item_puzzle_hive2spear
item_mana_combo_half
item_mana_combo_quarter
item_mana_defensive_full
item_mana_defensive_half
item_mana_offensive_full
item_mana_offensive_half
item_puzzle_minecartwheel
item_puzzle_ore
item_puzzle_plazacontainer
item_puzzle_potion
item_puzzle_refinedore
item_puzzle_shield
item_puzzle_canyonkey
item_puzzle_cloudkey
item_puzzle_cogitem_puzzle_crystal item_puzzle_dungeonkey