taken from The Eyre Affair and has the time traveler give Shakespeare a book detailing his plays which Shakespeare copies. The result is no one actually writes the plays!) Plastic Time (past can be changed but there are dangers to doing so) Traveler at Risk (Example: Back to the Future) World at Risk (Examples: Back to the Future II, and New Twilight Zone Episode "Portrait in Silver") Past or Traveler at Risk (Combines Traveler at Risk and World at Risk) Returned Blocked Chaotic Time (extreme version of Plastic Time where small changes can result in big alterations. Example: short story "A Sound of Thunder") Plastic Time with High Resistance (It is very hard to change history and the larger the event the more difficult it is to change. Examples: Twilight Zone episode "Back There", The Time Machine (2002 film) Paradox-Proof Time (Extreme version of Fixed Time where the past cannot be changed and any attempt to do so snaps you back to your present.) New Timelines Parallel Worlds (Time travel is really parallel universe travel. Examples: Timeline (novel), James P. Hogan's The Proteus Operation and the Parallels (Star Trek: The Next Generation) episode all use the Parallel Worlds mechanic for alternate timelines (Data calls them Quantum Realities). There are some other ideas provided to make things either easier or more difficult for your intrepid travelers such as Linearity Principle, Oscillating Time, Recency Effect, and Temporal Exclusion as well how communication works. Infinite Characters Special notes on certain rules in the setting and character templates. Infinite Campaigns Designing the campaign's scope and direction. Alternate Infinities This chapter provides alternatives to the "default" Infinity setting. The Order of the Hourglass - psychic time travel The Time Corps - a setting similar to that of Pacesetter's Time Master series where the player's homeworld is battling against an alternate timeline (called Stopwatch) with access to the past as the prize. The Horatio Club - a house whose doors open on to other times and other histories. Publication history GURPS Infinite Worlds was designed by Kenneth Hite, Steve Jackson, and John M. Ford, and published by Steve Jackson Games in 2005. Reception GURPS Infinite Worlds won the 2005 Origins Award as Best Game Supplement. See also List of GURPS books List of campaign settings References Alternate history role-playing games GURPS 4th edition Infinite Worlds Infinite Worlds Origins Award winners Parallel universes in fiction Role-playing game