BioWare built KOTOR's system on Wizards of the Coast's Star Wars Roleplaying Game: its classes, feats, skills and dice-roll combat are that tabletop game's d20 rules running under the screen.
Tabletop RPG· 2000· Role-Playing
Star Wars Roleplaying Game
by Bill Slavicsek, Andy Collins, JD Wiker
Star Wars Roleplaying Game: 1 recorded work traces back to it, and it draws on 1 recorded source.
What Star Wars Roleplaying Game influenced
Works that record this one as a source, with the evidence a contributor gave.
What influenced Star Wars Roleplaying Game
The works this one is recorded as drawing on.
Wizards of the Coast's Star Wars Roleplaying Game is a d20 System game: the rules framework derived from the third edition of Dungeons & Dragons, published by the same company the same year, carried over to the Star Wars galaxy.