Huge Steam Leak Reveals Unannounced Games and Achievements

A massive datamining leak has hit Valve's Steam platform, exposing scores of unannounced and yet-to-be-released games alongside their complete achievement lists. Surfacing in the early hours of September 9th, the monumental unveiling appeared across Exophase, a popular destination for tracking trophies and achievements across a wide variety of platforms.

According to information shared on ResetEra by Exophase site owner x3sphere, the leak stems from a mishap on Valve's end. A server issue or slip-up caused the platform's API to become suddenly accessible and discoverable, allowing achievement lists that should have remained private to be scanned automatically into the tracking database. Typically, games without actual names do not populate with achievements, but the incident caused numerous unknown titles—logged temporarily by their AppIDs—to flood the site.

The extensive list of affected projects includes established titles and previously unrevealed concepts alike. Notable entries appearing in the data include Persona 5, Fable, Star Wars: Galactic Racers, Horizon Hunters Gathering, Thief: The Dark Project Remastered, and Tomb Raider: Legacy of Atlantis. Furthermore, substantial secrets have reportedly surfaced for upcoming titles such as Kingdom Hearts 4.

Beyond known franchises, the leak has brought entirely unanticipated projects out into the open. These include a new The Walking Dead Telltale collection, a new Shrek game, a Twin Peaks title, a project tied to Dune, and several other mysterious entries carrying placeholder titles that require further sleuthing to identify.

The incident carries significant implications for the wider gaming community, particularly because the exposed data includes secret achievements that risk spoiling critical story elements for unreleased projects.