The verdict on this one is simple: somebody's spreadsheet got loose, and now half of gaming YouTube is running a forensic audit on Valve's backend instead of waiting for a press release. According to Eurogamer, a large-scale leak has pushed full achievement lists for unreleased and even unannounced PC games onto the internet, Persona 6 and Kingdom Hearts 4 reportedly among them. Nobody at Valve, Square Enix, or Atlus has said a word about it publicly, which is the part every headline seems to be skipping past.

The channel DreamcastGuy, in the video HUGE STEAM LEAK! THOUSANDS of Games LEAKED, Kingdom Hearts 4, Persona 6, UNRELEASED stuff AND MORE!, pins the cause on an error by Valve that exposed achievement data through a third-party site, and lists Ace Combat 8, Judas, Control Resonant, Deus Ex Remastered, and Tomb Raider: Legacy of Atlantis as part of the haul, alongside vaguer references to a possible new Balatro project and a Thief campaign called The Tarnished Mirror. That's a lot of specificity for something nobody's verified (achievement metadata for games that don't officially exist yet is exactly the kind of thing a placeholder entry loves to fake). CamNuggets, in Steam Leaked 125 Unreleased Games (Persona 6, Kingdom Hearts 4, and Shrek 2), puts a number on the scale, claiming over 125 achievement lists surfaced, and even flags a possible Shrek game remaster buried in there. Test that claim yourself once the achievement counts are cross-checked against Steam's actual API, because a number that round from an internal leak deserves the same skepticism I give a publisher's benchmark slide.

The part with actual teeth is the Kingdom Hearts 4 material. TheGamersJoint's description says the Japanese-region achievement list went public with full descriptions attached, the kind of text that spoils specific story beats rather than just confirming a game exists, and GameCross covers the same leak in The BIGGEST Gaming LEAK of All Time, citing a Gematsu report on the same Steam achievement surfacing. That's four YouTube channels and Eurogamer converging on the same core claim, which tells you the leak is widely carried, not that Kingdom Hearts 4's ending is locked in. If you're chasing that game and want to stay clean, this is your one warning: achievement descriptions are basically a spoiler cheat sheet with extra steps.

No studio or platform holder has confirmed any of it as of this writing, not the games list, not the achievement text, not the cause. Until Square Enix, Atlus, or Valve says otherwise, treat every title on that list as a rumor with a suspiciously specific font, including the ones that sound too on-brand to be fake.