Playable Online Scream Game Uncovered in Major Steam Leak

Over the weekend, a significant leak of Steam files from 2003 to 2013 surfaced online. Gamers have been sifting through the massive 13-terabyte trove in search of intriguing pre-release builds and betas. While many were likely hoping to uncover an incomplete build of Half-Life Episode 3, what they found instead was an unreleased and unfinished online horror game inspired by the Scream franchise.

On August 31, a Twitter user known as Roly Poly Reaper shared their findings from the leak, revealing a previously unannounced Scream game developed by Fatshark, the studio behind co-op titles like Warhammer 40k: Darktide and Warhammer: Vermintide 2.

update: we got multiplayer to work using goldberg emu + radmin VPN. here’s footage of it running in the final build of the game pic.twitter.com/CpWOF9Y7RP

— roly poly reaper (@fellarobux) August 31, 2026

Roly Poly Reaper claims to have discovered several unfinished builds of this Scream game within the Steam leak and managed to get them running on their PC. They even enabled multiplayer support in a later build, allowing others to join in on the incomplete horror experience. The footage shows players taking on the roles of survivors trying to evade Ghostface, while one player controls the masked killer.

Interestingly, this Scream game was reportedly developed by Fatshark around 2011, which predates the surge of asymmetrical horror games that gained popularity a few years later, such as Dead By Daylight and Friday the 13th. A new asymmetrical horror title, Halloween: The Game, is set to launch this month, and early trailers suggest that Michael Myers has a similar “ghost mode” to Ghostface in the leaked prototype, allowing the killer to move stealthily around the map and ambush victims.

Details about this unfinished Scream game remain sparse. The discoverer speculates that it was likely just a pitch, as the builds and data are stored in folders labeled “Scream_Pitch” and “Screampitch_inside.” Further supporting this theory, the last version of the game appears to have been worked on in February, just months before Scream 4 hit theaters.

It’s intriguing to ponder what might have happened if this pitch had been greenlit and the online Scream game had been completed and released. Could it have become the go-to online asymmetrical horror game, potentially beating Dead by Daylight to the punch? Or would it have flopped, possibly discouraging developers from pursuing asymmetrical online horror games altogether?