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Valve leak exposes achievements for 145 unreleased games

9/10/2026

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Summary

Story summary

Valve inadvertently exposed Steam achievement data for dozens of unreleased games.
Exophase scanned the data after its API mistakenly made private achievement lists public.
The leak covered 145 titles, including Kingdom Hearts 4, Persona 6, Gears of War: E-Day, and Silent Hill: Townfall.
Developers have not confirmed details and warn fans of possible spoilers.
Valve has not issued an official comment as of 9 September 2026.

History

Historical Context

In August 2014, a group posted nearly 500 private photos of more than 100 celebrities after compromising iCloud accounts, prompting FBI investigations and spotlighting phishing attacks. The September 9 2026 accidental release of achievement data for 145 unreleased games through Valve’s Steam API mirrors that earlier cloud-security breach, highlighting persistent platform-access vulnerabilities.

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Story summary

Valve inadvertently exposed Steam achievement data for dozens of unreleased games.
Exophase scanned the data after its API mistakenly made private achievement lists public.
The leak covered 145 titles, including Kingdom Hearts 4, Persona 6, Gears of War: E-Day, and Silent Hill: Townfall.
Developers have not confirmed details and warn fans of possible spoilers.
Valve has not issued an official comment as of 9 September 2026.

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