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.

Defeat Kid Tannen.

Find "Chuckles Lenart".

Enjoy a full set from Hill Valley's leading songstress.

Get a full explanation of your situation.

Rescue Arthur with minimal fuss.

Achieve Battle Rank 15

Kill 10 enemies carrying the cargo in Cargo

Spend 500,000 rupees total at Trading Posts (Campaign only).