Exophase, a site dedicated to tracking achievements for games across all major platforms including Steam, appears to have been flooded with a bunch of achievements lists it really shouldn't have yet. These include a huge—and importantly, yet to be unverified—list of major forthcoming games including Persona 6, Deus Ex Remastered, Horizon Hunters Gathering, Judas, Kingdom Hearts 4, and many more.
Among those, possibly the biggest surprise is Persona 6. It doesn't even have a release window yet, but its achievements list—assuming it's as legitimate as it looks—is rife with plausible spoilers. You have been warned: there is a lot in there, considering Atlus hasn't even shown gameplay footage yet.
Meanwhile, the achievements list for Kingdom Hearts 4 may reveal a lot about the 2027 instalment that Square Enix no doubt wants to keep under wraps. For example (huge spoilers ahead), Reddit fans have gleaned from the achievements which worlds from Disney's extended universe are most likely to appear, including the corroboration of a widely-believed rumor. Again, you've been warned.
The torrent of listings even includes Steam games that haven't been announced or named in Steam's backend yet. Among the more interesting examples are a possible Balatro follow-up (look at the image thumbnails) and seemingly verified rumors that the forthcoming Thief: The Dark Project Remastered will come with a new campaign called The Tarnished Mirror.
It also looks like Squadron 42, the singleplayer campaign component of Star Citizen which was delayed to Q2 2027 last week, may make its way to Steam.
It certainly has the makings of a smaller version of the infamous 2021 Nvidia leak, if it's all actually real (and it appears to be). Other achievements leaked for known games include Attack on Titan 3, Kena: Scars of Kosmora, Star Wars: Galactic Racer, Stranger Than Heaven, Tomb Raider: Legacy of Atlantis, and Control Resonant.
I've reached out to Valve to see if they have a statement on the matter. This story is definitely developing: if the leaks are real, more titles are likely to come to light in the coming hours.
