Oxenfree is a single-player graphic adventure game played from a 2.5D perspective, with the player controlling a teenager named Alex. Its central mechanic is a "walk and talk" system, where dialogue appears as speech bubbles and the player chooses responses in real time while still moving and exploring, shaping relationships with the other characters. Puzzles are solved largely by tuning a handheld radio to specific frequencies or adjusting tape recorders. The game has no fail state, and the player's choices lead to one of several possible endings. It was followed by a sequel, Oxenfree II: Lost Signals.