Star Wars M20:
Not much needs to change. Simply choose equipment from the Star Wars universe and change the races and classes as follows:
Races:
Humans and Zabraks get +1 to all skill rolls.
Bothans, Duros, Ewoks, Gungans, Kel Dor, Rodians, and Sullustans get +2 Dex
Gamorreans, Quarrens, Trandoshans, and Wookiees get +2 Str
Cereans, Ithorians, Mon Calamari, and Twi'lek get +2 Mind.
* Duros and Kel Dor could reasonably be given +2 Mind instead of Dex.
Classes:
Jedi wear no armor, get +3 on Knowledge checks, and can use the Force (treat this like spellcasting).
Nobles can wear light armor, get +3 on Communication checks, and can inspire allies (once per turn, grant an extra action to any ally).
Scoundrels can wear light armor, get +3 on Subterfuge checks, and can sneak attack like M20 Rogues.
Soldiers can wear any armor and use any weapons, get +3 on Physical checks and +1 on attack and damage rolls, increasing by +1 at 5th level and every five levels thereafter.
The Force:
Much like spellcasting in M20, using the Force costs Hit Points. The cost is commensurate with the effect.
Minor effect: 1hp
Medium: 5hp
Major: 10hp
Legendary: 20hp
Minor effects are things you'd expect half-trained Force-sensitives to be able to pull off, like Luke pulling the lightsaber out of the snowbank in Empire Strikes Back.
Medium effects are things that most Jedi Knights would be able to do -- like Luke's Force-use in Return of the Jedi.
Major effects are things that require the training and discipline of a Jedi Master.
Legendary effects are things that Yoda could pull off. Lifting Luke's X-Wing out of the swamp on Dagobah is the classic example.
If characters use the Force to deal damage in combat, they deal damage dependent on the level of effect they use:
Minor d4
Medium d6
Major d8
Legendary d10
Force powers deal one die of damage per level of the Jedi.
