Playable version of cancelled Portal prequel F-Stop leaked online

A near-complete playable build of the cancelled Portal prequel F-Stop has been assembled from assets in a 12-terabyte leak from August, plus missing final pieces shared on the Valve Cut Content Discord. The game's source code and map data were not in the original leak, but the new material made the build possible. The game's camera-and-Polaroid mechanic sets it apart from the mainline Portal titles.

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