Cheat Mode
Open the Ultima Ascension folder, and find the file called default.kmp. Now open the file with a NotePad and add the following line: ''[Cheat Commands]'': (Copy and Paste these)
You can always turn off these cheats anytime by entering them again.
Teleporters!
Right at the beginning of the game at the Avatars house, if you go outside to the hopscotch court you will see a rock. Climb up onto the rock and jump onto the frame of the dummy. When onto the dummy (can take practise) aim the crosshair above the fence and towards the tree on the other side of the fence. Jump, and you should be on the other side. Now that you're there walk around the tree to its far side. Look down at the base where the glass rises up and click around a bit. This will activate the teleporters. The ones closest to the fence change your armour while the further ones take you to major plot points.
(Unfortunately, while you can keep the armour, I have not found a way to get magic whilst playing through this way, and keep the armour.)
Invisible to monsters:
Press B to open your backpack and attack monsters. They will ignore you as long as the backpack remains open. Note: Drag the backpack to the edge of the screen for a better view.
Body parts in refrigerator:
While in the Avatar's house, go to the kitchen. Look around for a refrigerator. Open and close the fridge door ten times. If done correctly, the last time you open the fridge, you will find many skinned body parts inside.
Kill Lord British:
When you start, go to the refrigerator find the rat poison, then use the breadmaker. When you get to Britain, go to his secret dining room. Replace the bread with the poison bread. Lord British will eat it and die. Note: Save before doing this since the guards will kill you.