| This is regarding an unofficial conversion of another RPG to GURPS |
GURPS Warhammer 40,000 has two known community conversions.
- GURPS Warhammer 40,000 Conversion for GURPS 4th edition (Olaf Ostheimer, 2014) is a 45 page light conversion mapping much of Warhammer 40,000 to Ultra-Tech and providing a general overview of the major races and equipment. It uses a point range from 0-400, and focuses on keeping the content balanced with existing GURPS rules, such as Ultra-Tech and Bio-Tech. It also provides some support for creating planets, running a campaign, and converting from the Fantasy Flight Warhammer 40,000 RPGs to GURPS.
- GURPS Unofficial: Warhammer 40,000: Imperium (Fennefell, 2022, Feedback Thread) is a 65 page in-progress heavy conversion focusing on the Imperium and it's various Adepta, with in-depth detail for each facet of the Imperium. It uses a point range from 0-1200, and has an internal balance that is incompatible with Ultra-Tech. Per the feedback thread, emphasis is placed on internal balance, feeling like Warhammer 40,000, and maximizing the Game Master's design space. It also provides some support interspersed through the book on how to run campaigns, but no support for converting from the Fantasy Flight Warhammer 40,000 RPGs to GURPS.