Bought all 5 episodes off Steam and so far, Halfway through the second one, I am really liking it.
If you never heard of it, it is an adventure game that begins 6 months after the end of BTTF III in 1986 and you play Marty who has to… [Minor Spoilers of the setting of the game]
…go back to 1931 to rescue the Present Day Doc Brown with the help of Teenage Doc Brown.
Great voices (some of them from the original actors), decent Animation and touches that really make it fun. Also has built in hints if you would rather just play to enjoy the story.