Superworld is a superhero-themed role-playing game published by Chaosium in 1983 that uses the generic Basic Role-Playing rules system. The game began as just one part of the Worlds of Wonder product before being published as a stand-alone game. In competition against other well-established and popular superhero games, Superworld never found an audience, and was discontinued after only three supplements were published for it.

Superworld uses Chaosium's Basic Role-Playing system, with the addition of rules for super-powers.

The game box contains

Editions printed in 1984 and later also contain a 4-page booklet of errata.

As with all games using the Basic Role-Playing rules, skill tests and combat are resolved by rolling percentile dice against skills. Rolls that are much lower than needed can result in increased effect, while high rolls can cause critical failures. Combat rules have many options and take into account three types of energy for damage: Kinetic, Electric, and Radiation.

In 1982, Chaosium published Worlds of Wonder to demonstrate the flexibility of its generic Basic Role-Playing System; the game included three separate settings with the idea that player characters could be moved from setting to setting using the same rules system:

The following year, Superworld was published as a stand-alone boxed set designed by Steve Perrin, with interior illustrations by Chris Marrinan, Markus Harrison, and cover art by Michael Dooney.

Three supplements followed: