Minigames (formerly known as Activities) are small games in which player(s) set out to complete a certain objective. These games sometimes allow players to gain experience and items. They are identified with a red star icon on the map. Minigames can be repeated, unlike quests or miniquests which can only be completed once. In the Mage Arena minigame, Kolodion cannot be refought after defeating his fourth form, but the arena itself can still be used afterwards.

All minigames used to require membership, until now five minigames are available for free-to-play players: Clan Wars, Duel Arena, Fist of Guthix, The Great Orb Project, and Runespan.

Minigames in RuneScape are classified as either Safe or Dangerous depending on whether items are kept on death.