"Until Dawn" is a survival horror video game developed by Supermassive Games and released in 2015. The game follows a group of eight friends who reunite at a remote mountain lodge one year after a tragic incident. Players control the characters and make choices that affect the story's outcome, leading to multiple possible endings. The gameplay features a unique "butterfly effect" system, where decisions impact the narrative and character survival. Players must navigate through various challenges, including quick-time events and exploration, while uncovering the mysteries surrounding the lodge and the dangers lurking in the woods, including a mysterious killer and supernatural elements.