He must go to save Emmett Brown, and is teleported back to the 1950s, where the events of the first movie in the franchise takes place. The story follows mainly the story of the film franchise, starting with Marty as the first unlocked character roaming Hill Valley. Creating a paradox during a mission will reset it completely. During the game, the player must strive to avoid creating paradoxes created by messing with the main storyline. Times can be swapped by simply using the Delorean time machine. LEGO BTTF has an open world landscape, allowing the player to go through the entirety of Hill Valley, in five different times 1985, 1985A, the Old West, the 50s, and 2015, each having different characters, missions, and a slightly altered map.
Also similar to other LEGO games is the ability to destroy objects and gain studs for characters and cheats.
Similar to other LEGO games, each unlockable character has a special ability that can be used in both the missions and in the open world.
