The game most directly about the Emperor’s story in Warhammer is Warhammer: The Horus Heresy: Legions , which is set during the Horus Heresy, the origin-era conflict around the Emperor and the rise of the Imperium.

Best match

  • Warhammer: The Horus Heresy: Legions follows the civil war that plunged the Empire of Mankind into turmoil and is explicitly tied to the origin story of Warhammer 40,000.
  • If you want the Emperor’s broader lore rather than a single game, many Warhammer lore videos and guides cover his rise, the Great Crusade, and the Horus Heresy in more detail.

Important nuance

  • The Emperor is not the main playable protagonist in most Warhammer games; instead, games usually focus on the Horus Heresy, Space Marines, or other factions.
  • So the answer depends on what you mean by “tells the story”: Legions is the clearest game tie-in, while lore-focused videos and articles cover the Emperor’s full history more directly.

TL;DR

  • Closest game: Warhammer: The Horus Heresy: Legions.
  • Best full story source: Warhammer 40K lore guides and Horus Heresy explainers.