On September 8, 2026, gamers worldwide were buzzing over a rare data leak: achievement lists for around 50 unreleased games suddenly appeared publicly on Exophase, a site that tracks achievements across Steam, the Epic Games Store and other platforms. The cause was reportedly a mistake on Valve’s backend that exposed data meant to be private through Steam’s public API.
Persona 6: a Yokohama setting and a mysterious group called Hex
The 48 achievements attributed to Persona 6 revolve around a new setting called Yokohama and the appearance of a mysterious organization named Hex. These are the first story details to leak since ATLUS confirmed the game is in development.
Kingdom Hearts IV: Star Wars and Toy Box worlds
For Kingdom Hearts IV, the 50 leaked achievements point to several new Disney worlds beyond Quadratum and Hollow Bastion (Coco), which were already confirmed, including a Star Wars-inspired world, Toy Box (Toy Story) and Scala ad Caelum.
Fable, Metro 2039 and dozens more
Besides the two headline names, the leaked lists include achievements for Fable (Xbox Game Studios’ reboot), Metro 2039, Gears of War: E-Day and many other titles such as Star Wars: Galactic Racer, Judas, Kena: Scars of Kosmora, Final Fantasy Resonance and Tomb Raider: Legacy of Atlantis.
How did Valve respond?
Shortly after the news spread, Valve reportedly patched the API hole that allowed private achievement data to be retrieved. But because the leak was distributed — many third-party sites had saved the data — most of the information kept circulating among gamers.
- When: September 8, 2026
- Source: achievement tracker Exophase, via a Steam API hole
- Games affected: around 50 unreleased titles
- Big names: Persona 6, Kingdom Hearts IV, Fable, Metro 2039, Gears of War: E-Day
Sources: GameSpot, Gematsu, Video Games Chronicle, TheGamer.