While on the adventure screen (where you move your character and etc.) press Ctrl, Shift, and ~. Then a '?' should appear on the left side of the screen, where you can input the codes.
Cheat Effect
[Item Name] Summons an item near you.
[Creature Name] Summons a creature near you. Any creature you summon this way will exist as an enemy monster; however, typing “Cat” or “Terrier” will summon a pet
Levelup Gives you one experience level
Heal Restores all of your health
God Gives you ten experience levels and eight to your pet
Fame Adds 1000 fame points to your character
Gold Gives you 500,000 pieces of gold
Dumpmap Creates a text description of the current map to a maze.txt file, which can be found in the game’s installation folder
Experience Adds 5000 experience points to your character
Descend "#" Descend a "#" of levels (input a number and remove quotes)
Ascend "#" Ascends a "#" of levels (input a number and remove quotes)
Fate Statue Creates a statute that when activated you get either a unique Monster or 2 Random Gems
Shrine Of Learning Creates a Shrine that when activated generates a random negative or positive effect on character stats
Magic Anvil Creates an Anvil that when activated grants you a random Negative or positive magical effect on an item
Fountain of Wellness Creates a Fountain that when activated replenishes Both Health & Mana
Fountain Of Health Creates a Fountain that when activated replenishes Health
Fountain Of Stamina Creates a Fountain that when activated replenishes Stamina
Fountain of Mana Creates a Fountain that when activated replenishes mana
Small Chest Shows up but there is nothing in it
Chest Shows up but there is nothing in it
Large Chest Shows up but there is nothing in it
Storage trunk Shows up but can't be opened in town (This might work in dungeons)
Weapon Rack Shows up but can't be activated
Blood Use blood instead of stars
Noblood Make the blood go back to stars