A 2006 open-world RPG set in Cyrodiil where the player, guided by the Blades, seeks to stop the Daedric Prince Mehrunes Dagon by closing Oblivion Gates and restoring the Septim line.
- Developer: Bethesda Game Studios
- Genre: Open-world action RPG
- Platforms: PC, Xbox 360 (2006), PlayStation 3 (2007)
- Mechanics: Radiant AI NPC schedules, level-scaling world, flexible skill-based character growth, guild questlines, Oblivion Gate realms
- Notable: Major leap in open-world immersion at release, influential modding scene, precursor to Skyrim’s broader popularity