Xbox Mythic Achievement Uncovered in PC App Code

Microsoft is working on a new feature called 'Mythic' for its Xbox PC app. This achievement would be retroactive, meaning it would reward players who have completed each game's base list without needing any new content or price changes.

The evidence of this feature comes from the latest version of the app (2610.1000.53.0) and presentation materials that describe retroactive awards with no Gamerscore. The feature flag is currently off, and there is no data on Microsoft's servers to confirm its existence.

Xbox revenue fell 7% in fiscal 2026, but the Mythic feature could help boost completion status persistence and visibility across players' libraries. This could lead to increased engagement without adding new content or increasing prices.

Microsoft has not announced the Mythic achievement, and it's unclear when it will be activated. The company's shares closed at $500.59 on September 23, up 0.52% from the previous day. Analysts have different predictions for Microsoft's revenue, with targets ranging from $440 to $608.