Gave Emmett his Epiphany.

Take the fewest possible trips to Emmett's lab.

Got Trixie ready to make Edna jealous.

Crafted a mind map of Emmett that reveals him to be a "Degenerate Criminal."

Revealed the Hill Valley hooliganism rate.

Rescued Citizen Brown from the Citizen Plus program.

Layout Biff and escape the speakeasy.

Jumped into the Decycling Bin.

Collect every Demerit in the game.

Use the spray can to paint Marty's band name in the alley.

Coax Edna out of the courthouse with the buzzer.

Use the DeLorean parts to enter Hill Valley.