The classic horror of the Cthulhu Mythos meets the dark future of cyberpunk . . . CthulhuPunk! The investigators now have supercomputers, cyborged bodies, and deadly new hand weapons – but the breakdown of society has given the malevolent entities of the Mythos new breeding grounds for corruption and decay.

GURPS Cyberpunk is a genre toolkit for cyberpunk-themed role-playing games set in a near-future dystopia, such as that envisioned by William Gibson in his influential novel Neuromancer. It was published in 1990 after a significant delay caused by the original draft being a primary piece of evidence in Steve Jackson Games, Inc. v. United States Secret Service.

It's the year 2100. Humans have colonized the solar system. China and America struggle for control of Mars. The Royal Navy patrols the asteroid belt. Nanotech has transformed life on Earth forever, and gene-enhanced humans share the world with artificial intelligences and robotic cybershells. Our solar system has become a setting as exciting and alien as any interstellar empire. Pirate spaceships hijacking black holes . . . sentient computers and artificial "bioroids" demanding human rights . . . nanotechnology and mind control