Heretic 2
Note: To use these codes simply enter then in the console ('~' key toggles console)

Cheat Codes:
playbettergod mode on/off
twoweekspowerup on/off
meatwagonkill all non-boss monsters
victorkill all monsters (including BOSS)
Other Codes:
angermonstersmonsters get angry
crazymonstersmonsters out for blood
kiwiclipping on/off
showcoordsshow coordinates
weapprevselect previous weapon
weapnextselect next weapon
suckitdown chickenTurns you into a chicken
suckitdown allGives you all (usefull) items
suckitdown healthGives you maximum health (100%)
suckitdown manaGives you maximum offensive and defensive mana (100%)
suckitdown armorGives you silver armor; second use gives you gold armor
suckitdown powerupGives you a Tome of Power powerup
suckitdown teleportHeretic 2 demo only - Gives you the Teleport defence
suckitdown polymorphHeretic 2 demo only - Gives you the Morph Ovum defence
spawn item_weapon_hellstaff Spawns Hellstaff weapon
.
Item Spawn Code:
spawn - create an item where is one of the following item names:

item_weapon_firewall
item_weapon_maceballs
item_weapon_magicmissile
item_weapon_phoenixbow
item_weapon_redrain_bow
item_weapon_sphereofannihilation

item_defense_meteorbarrier
item_defense_polymorph
item_defense_powerup
item_defense_ringofrepulsion
item_defense_shield
item_defense_teleport

item_health_full
item_health_half

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_canyonkey
item_puzzle_cloudkey
item_puzzle_cog
item_puzzle_crystal
item_puzzle_dungeonkey
item_puzzle_highpriestesskey
item_puzzle_highpriestesssymbol
item_puzzle_hive2amulet
item_puzzle_hive2gem
item_puzzle_hive2spear
item_puzzle_minecartwheel
item_puzzle_ore
item_puzzle_plazacontainer
item_puzzle_potion
item_puzzle_refinedore
item_puzzle_shield
item_puzzle_slumcontainer
item_puzzle_tavernkey
item_puzzle_tome
item_puzzle_townkey