Elders Scrolls The Morrowind Codes -

Change health level:
Push while playing the game to display the options. Push or to get to the statistics prompt by cycling. Highlight the health bar, push , , , , , then press and hold to set a new health level. Push to exit. When you get hit, your health will automatically go back up. You can only use one code at a time.
 

Change magicka level:
Push while playing the game to display the options. Push or to get to the statistics prompt by cycling. Highlight the magicka bar, push , , , , , then press and hold to set a new magicka level. Push to exit. When you use magicka, it will automatically go back up. You can only use one code at a time.

 

Change fatigue level:
Push while playing the game to display the options. Push or to get to the statistics prompt by cycling. Highlight the fatigue bar, push , , , , , then press and hold to set a new fatigue level. Push to exit. When your fatigue changes, it will automatically go back up. You can only use one code at a time.

Unlimited arrows:
Equip a bow, then any arrow. Hold Attack to pull the arrow back. Enter the inventory screen with the arrow still pulled back. You may now release Attack. Unequip the arrows and resume the game. It will now continue to shoot the arrow. After it fires, it will not count that arrow to be missing.
 

Increase weapon skill:
Find a weapon that has bound whatever that weapon is (for example, a katana with bound long sword) and cast the Bound spell. When the weapon appears, hold + and your weapons will continuously switch. When the bound weapon wears off, your stat with the weapon should have increased dramatically. For example, it is possible to raise my longs word skill from 50 to over 2000 in about five minutes.