A canceled multiplayer Scream game developed by Fatshark has allegedly been uncovered inside the massive Steam data breach that hit in August 2026, with rough gameplay footage and SteamDB entries suggesting it was a pitch prototype the studio built to secure the Scream license.
The find comes from an X user going by @fellarobux, who was combing through files exposed in a 12TB Steam leak that left older Valve archives sitting on an unsecured public access point. Among those files: Depot 42151, which turned out to contain a Scream game nobody knew existed.
What the footage actually shows
The gameplay clips shared by @fellarobux paint a picture of a pretty early-stage asymmetric horror title. Think Friday the 13th or Dead by Daylight territory, with Ghostface presumably filling the killer role. Nothing polished, nothing close to release-ready, but enough to make it clear this wasn't just a design document sitting in a folder somewhere.
Fatshark built this as a pitch, not a product
Here's the thing that makes this story more interesting than a standard canceled game: datamining the files suggests Fatshark never actually had the Scream license when they built this. The prototype appears to have been made specifically to pitch for that license.
The final build is timestamped February, which puts it roughly two months before Scream 4 hit cinemas. The studio most likely assembled a playable proof-of-concept, sent it off, and never heard back with a yes. SteamDB backs this up: the app ID that @fellarobux tracked down was initially mislabeled as another Fatshark title, but digging further revealed it listed as an 'Upcoming Fatshark Game' with a last known name of Scream Prototype.
Fatshark is a Swedish studio with a track record in co-op survival games, having shipped Warhammer: Vermintide 2 and Warhammer 40,000: Darktide. A licensed horror multiplayer game would have been a different direction for them, which might explain why the pitch never went anywhere.
The leak that made this possible
The Steam breach itself is the bigger story sitting underneath all of this. A 12TB archive of older Valve files was left on an unsecured server, accessible to anyone who knew where to look. The Scream prototype is just one find from people actively going through those files, and it almost certainly won't be the last.
Valve has not commented publicly on the breach or on the specific files being surfaced. Whether any of this leads to legal action around redistribution of the files remains an open question.
What could have been
A Scream multiplayer game in the Dead by Daylight mold, built by a studio that knows co-op horror, could have been genuinely compelling. The franchise has the villain for it in Ghostface, and the asymmetric horror genre had real momentum at the time this prototype was apparently built. The pitch just never got approved.
For anyone already into horror gaming, the Dead by Daylight guides collection is worth checking out while this story develops. And if you want to stay across everything else surfacing from the leak and the broader gaming news cycle, the full gaming guides and news hub has you covered.
