Independent developer Half Past Yellow has announced that its co-op horror game Stream Train will officially launch on Steam on October 15, 2026. Alongside the release date reveal, the developer has also opened sign-ups for an upcoming playtest, giving players a chance to get an early look at its unusual blend of multiplayer survival horror and livestreaming.
Stream Train puts up to six players together aboard an old steam train as they venture into the mysterious Uncanny Valley, a wilderness filled with cryptids, ghosts and other strange entities. Rather than simply trying to survive their journey, the group will also be attempting to turn their increasingly dangerous expedition into viral entertainment.
The premise revolves around players livestreaming their adventure as they travel along an abandoned railroad and investigate derelict locations scattered throughout the wilderness. The goal is not only to make it out alive, but to keep an audience watching by capturing interesting footage, completing requests and creating memorable moments along the way.
That audience is more than just a background feature, too. The game’s livestream chat actively reacts to what players are doing, with viewers making requests, responding to unexpected situations and rewarding entertaining behaviour with donations and other forms of support. Keeping the audience engaged therefore becomes an important part of staying alive.
This creates an unusual balancing act for the group. Players have to explore dangerous areas and deal with supernatural threats while also thinking about what might make good content. A terrifying encounter could be something to run from, but it could also be exactly the kind of footage that keeps viewers watching.
The wilderness is home to a variety of threats, including cryptids, ghosts and mysterious forest creatures. Players will have to learn how to deal with the different dangers they encounter while remembering one particularly important rule: don’t make the creatures angry. Of course, if that fails, there is always the option of keeping the camera rolling and turning the disaster into content.
The game also allows players to customize their avatars before setting out together. With support for up to six players, Stream Train is built around the unpredictable situations that can arise when a group of friends attempts to turn a dangerous expedition into a successful livestream.
Half Past Yellow CEO Remy Stuurwold said the team has put considerable effort into the project and is looking forward to finally getting it into players’ hands. Game Director Max Wrighton also explained that the idea of using livestreaming as an actual gameplay mechanic had been something he wanted to explore, with the concept eventually being combined with the social co-op style of the game.
The result is a horror game where survival is only part of the challenge. Players will have to decide when to play it safe, when to take risks for the sake of their audience and what to do when their attempt at internet fame puts them directly in the path of something that wants them dead.
Stream Train is scheduled to launch on Steam on October 15, 2026. Players interested in checking out the game ahead of release can wishlist it and register for the upcoming playtest through its Steam page.