A 2009 multiplayer online battle arena (MOBA) where two teams of five battle across Summoner’s Rift, destroying turrets to reach and defeat the enemy Nexus.
- Developer: Riot Games
- Genre: MOBA
- Platforms: Windows, macOS (2009–)
- Mechanics: 5v5 lanes and jungle roles, last-hitting for gold, item builds, objectives (Dragons, Rift Herald, Baron Nashor)
- Notable: Massive esports ecosystem (Worlds), frequent balance patches and new champions, global player base and cultural impact