Decay: The Mare is a psychological horror adventure game developed by Daedalic Entertainment for Xbox One. The game is the latest addition to the Decay series, which has gained popularity in the gaming community. The game follows the story of Sam, an addict who ends up in an institution named "Reaching Dreams" to overcome his drug addiction and improve his life. However, things take a turn for the worse when Sam gets stuck in an endless nightmare during his first night at the institution.

The game features amazing graphics, art, and music that create a compelling and eerie atmosphere. The storyline is deep and scary, keeping players on edge throughout the game. The game also features challenging riddles and puzzles that require players to use their critical thinking skills to progress. The game includes an exclusive third chapter that brings Sam's journey to an end, making it a complete and satisfying experience. Players can also unlock achievements and collect all Steam Trading Cards to receive exclusive emoticons and profile backgrounds.