Good game for true fans.
But the main retaining quality of the game is the story. As a big fan of the movies I was very intrigued to continue the story line. The game starts about 6 months after the 3rd movie, with Marty being more than a bit sad about Doc being gone. Then the Delorean shows up with no driver and Marty sets out to find out what happen. Also Christopher Lloyd does reprise his role as Doc Brown (AWESOME). And AJ Lacascio does such a great job as Marty that you forget that it isnt Micheal J Fox.
SPOILER ALERT Mr Fox does have a voice cameo.
Overall gameplay, controls, and framerate require that you be a bit patient to play the game, and replay value is almost non existent. But for TRUE FANS it is definitively worth playing.