Oxenfree is a single player adventure game, where the player plays the character Alex, a girl who has come to an island for a party together with her friend Ren and her new stepbrother Jonas. At the island, they meet up with Clarissa, former girlfriend of Alex' now deceased brother Michael, and Clarissa's friend Nona, that Ren has a crush on.
During the party, strange things start to happen, and the suspense/horror adventure starts. The game mainly consists of the player choosing dialogue and following the story that brings the five teenagers walking around the island. With the choice of dialogue, the player can influence the final epilogue when the adventure is over.