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Massive Steam Achievement Leak Exposes Potential Kingdom Hearts 4 Worlds

Private achievement lists appearing on third-party trackers have raised data-security concerns and risk spoiling multiple unreleased games.

Overview

  • Multiple outlets reported that achievement lists for unreleased games were scraped to sites such as Exophase and SteamDB on September 9, 2026, making internal game data publicly visible.
  • The leaked Kingdom Hearts 4 entries appear to name several Disney and Disney-adjacent worlds, including a Star Wars-themed location, though publishers did not confirm those specifics.
  • Exophase’s owner said the data may have been exposed by a Valve/Steam API error that allowed private achievement lists to be accessed, a claim being reported while Valve and publishers are contacted for comment.
  • Journalists caution the lists may be provisional because developers often upload achievements during development, so named worlds or objectives could change or be removed before final release.
  • The breach reaches beyond one title, with alleged achievements for Persona 6, Silent Hill: Townfall, Metro 2039 and other unannounced games also appearing, raising wider industry concerns about spoiler management and platform data controls.