Steam achievements leaked for dozens of unreleased and unannounced games.
Some of the achievement lists include spoilers and new details for games like Persona 6 and Kingdom Hearts IV, Gematsu reports. The owner of achievement-tracking site Exophase said in a post that the leak “Seems like a possible screw up on Valve’s end, a bunch of games with achievements that should be private are accessible through the API right now and that’s why they got scanned into the site.” [Link: Persona 6, Kingdom Hearts IV, and other Steam Achievements surface in large-scale leak | https://www.gematsu.com/2026/09/persona-6-kingdom-hearts-iv-and-other-steam-achievements-surface-in-large-scale-leak | Gematsu]
Some of the achievement lists include spoilers and new details for games like Persona 6 and Kingdom Hearts IV, Gematsu reports. The owner of achievement-tracking site Exophase said in a post that the leak “Seems like a possible screw up on Valve’s end, a bunch of games with achievements that should be private are accessible through the API right now and that’s why they got scanned into the site.” [Link: Persona 6, Kingdom Hearts IV, and other Steam Achievements surface in large-scale leak | | Gematsu]
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