Valve's long-lost prototype Portal prequel appears online after nearly 20 years

T2Covered by 1 source · first reported by IGN / GameSpot / PC Gamer / Kotaku at 01 Nov, 17:44 UTC

F-Stop was a result of a post-Orange Box, 2007 Valve game jam.

gaming

Sources

• T2Valve's long-lost prototype Portal prequel appears online after nearly 20 yearsIGN / GameSpot / PC Gamer / Kotaku01 Nov, 17:44