Here is the full list of all 59 Back to the Future: The Game - there are 30th Anniversary Edition achievements worth 1,000 gamerscore.
Solved the saloon puzzle with no more than two trips to the second floor.
Had a conversation with a cactus.
Treated Desert Edna to an algae cake.
Recorded everyone at the Expo.
Completed the glass house maze without going back up the stairs.
Got your money's worth at the Expo.
Impersonated three people over the phone.
Busted a move, 80's style.
Took the fewest possible trips to Emmett's lab.
Offered algae cakes to everyone.
Revealed the Hill Valley hooliganism rate.
Got a good look at Trixie's postcard.
Examined every container of contraband in the speakeasy.
Collected every Demerit in the game.
Coax Edna out of the courthouse with the buzzer.
Listened to all tourist audio guides in Hill Valley.
Rescued Arthur with minimal fuss.
Find a hidden passageway.
Found "Chuckles Lenart".
Defeated the Tannen Brothers in six jumps.
Flawlessly mixed up a batch of Emmett's Rocket Fuel.
Discovered the origin of the "new" DeLorean.
Heard about the curious fate of Marshall Strickland.
Perfectly repeated dialog while repeating Doc's temporal experiment.
Returned home.
Prevented the Great Hill Valley Fire.
Restored Edna's memory.
Emmett completes his spectacular failure at the Expo.
Marty and Emmett head to the Expo.
Gave Emmett his Epiphany.
Broke up Emmett and Edna.
Messed with Emmett's cleanser.
Emmett is prophetically honest about his marriage prospects.
Got Trixie ready to make Edna jealous.
Crafted a mind map of Emmett that reveals him to be a "Degenerate Criminal."
Rescued Citizen Brown from the Citizen Plus program.
Escaped from Marty's cell.
Layout Biff and escape the speakeasy.
Jumped into the Decycling Bin.
Got caught with Lorraine's booze.
Got caught with Einstein.
Got caught making out with Jennifer.
Use the spray can to paint Marty's band name in the alley.
Used the DeLorean parts to enter Hill Valley.
Defeated Kid Tannen.
Dried a cop out.
Got a gangster's girl to do the right thing.
Got a full explanation of your situation.
Enjoyed a full set from Hill Valley's leading songstress.
Broke the password code without cheating.
Tracked down a missing accountant.
Rescued Doc from Kid Tannen.
Acquired Emmett's Rocket Drill.
Managed to get 190-proof alcohol delivered to Emmett's.
Delivered the subpoeana to Arthur McFly.
Talked Emmett into completing the Rocket Drill.
Namechecked "Back to the Future" creators.
Traveled back in time to rescue Doc.
Got Doc's Notebook back from Biff.