Illustrator Tim Bobko contributed to Star Wars roleplaying sourcebooks published by West End Games.
- Alien Encounters (Interior illustrations)
- Alliance Intelligence Reports (Graphic design)
- Classic Campaigns
- Creatures of the Galaxy (Illustrations inside)
- Cynabar's Fantastic Technology: Droids (Design of the cover)
- The DarkStryder Campaign (Design of the book, graphic artistry, interior illustrations)
- Galaxy Guide 6: Tramp Freighters, Second Edition (Graphic artistry)
- Galladinium's Fantastic Technology (Graphic artistry)
- Gundark's Fantastic Technology: Personal Gear (Cover design, graphic artistry)
- Hideouts & Strongholds (Map creation)
- Imperial Double-Cross (Cover design, graphic artistry, interior illustrations)
- Imperial Sourcebook, Second Edition (Graphic artistry)
- Lords of the Expanse
- Platt's Smugglers Guide
- Player's Guide to Tapani
- Rules of Engagement (Illustrations inside)
- Shadows of the Empire Sourcebook (Illustrations inside)
- Star Wars Adventure Journal 2 (Graphic design)
- Star Wars Adventure Journal 4 (Graphic design)
- Star Wars Adventure Journal 6 (Graphic design)
- Star Wars Adventure Journal 12 (Cover design, graphic design) "Betrayal by Knight" (Illustrations inside)
- Star Wars Adventure Journal 13 (Graphic design)
- Star Wars Adventure Journal 14 (Cover design, graphic design)
- Star Wars Adventure Journal 15 (Cover design, graphic design) "Tasariq: The Crystal Planet" (Map creation) "The Draw" (Map creation)
- Star Wars: The Roleplaying Game, Second Edition, Revised and Expanded (Artistic design, graphic artistry)
- Star Wars Trilogy Sourcebook, Special Edition (Illustrations inside)
- Stock Ships (Art direction, graphic artistry)
- Tales of the Jedi Companion (Cover design, graphic artistry)
- The Thrawn Trilogy Sourcebook (Cover design, graphic artistry)
- The Truce at Bakura Sourcebook (Cover design, graphic artistry, interior illustrations)
- Wretched Hives of Scum & Villainy (Illustrations inside)