d20 Future is an accessory for the d20 Modern role-playing game written by Christopher Perkins, Rodney Thompson, and JD Wiker.

It facilitates the playing of campaigns in the far future, using elements such as cybernetics, mecha, mutations, robotics, space travel, starships, and xenobiology.

Campaign models introduced include: d20 Cyberscape is an expansion for the d20 Future supplement of d20 Modern.

It also includes a cyberpunk campaign model called CyberRave, in which the world has become a collection of corporation-owned and run countries.

The book contains additional material expands of the following topics already established in d20 Future: Weapons/Personal Gear, Starships, Mecha, and Robotics.