A significant leak may have inadvertently revealed details about numerous upcoming PC titles through Steam achievements. Exophase, a website that tracks game achievements across various platforms, has reportedly been inundated with achievement lists for games that have not yet been officially announced or detailed by their developers. These alleged leaks encompass a wide range of titles, including highly anticipated sequels and entirely new projects.
Among the most surprising potential revelations is Persona 6. Despite Atlus having yet to officially reveal the game or even show gameplay footage, an extensive achievement list has surfaced. This list, if genuine, contains numerous plausible spoilers for the unreleased title.
Similarly, the achievement list for Kingdom Hearts 4, a game with a previously stated 2027 release window, could offer substantial information about its content. Fan analyses of the leaked achievements suggest potential in-game worlds and plot points that Square Enix may have intended to keep under wraps for longer.
The torrent of leaked data also includes achievements for games that do not appear to have been officially named or registered within Steam's backend system. This includes what is suggested to be a follow-up to the popular indie title Balatro, with image thumbnails providing further hints. Additionally, a purported remaster of Thief: The Dark Project, potentially titled The Tarnished Mirror, is hinted at with a new campaign listed among its achievements.
Further titles that have had achievements leaked include Squadron 42, the single-player component of Star Citizen, which recently saw its release window shifted to Q2 2027, and may now be slated for a Steam release. Other reported leaks include achievements for Attack on Titan 3, Kena: Scars of Kosmora, Star Wars: Galactic Racer, Stranger Than Heaven, Tomb Raider: Legacy of Atlantis, and Control Resonant.
This situation draws parallels to a notable Nvidia leak from 2021, which also exposed details about unreleased hardware and software. Valve has been contacted for a statement regarding the alleged data leak. The full scope of the leak remains under development, with the possibility that more unannounced titles could come to light as the situation unfolds.