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A prototype Portal prequel called F-Stop, built at Valve, surfaced online on 1 November 2026 after nearly 20 years. PC Gamer reports it came from a post-Orange Box game jam at Valve in 2007.
Sources:PC Gamer
Updated
A prototype Portal prequel called F-Stop, built at Valve, surfaced online on 1 November 2026 after nearly 20 years. PC Gamer reports it came from a post-Orange Box game jam at Valve in 2007.
1 outlet · 1 article · first seen Nov 1, 1:00 PM ET