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.

Defend against 30 attacks from opponents in any level

Change your costume

Do everything you can for your Veep -- Quests, Loyalty Missions… everything.

Complete 'The Real World'.

Be airborne during Super Jumps for a combined 10 minutes of gameplay.

Buy your first Upgrade from the Upgrade Store.

Complete 'The Saints Wing'.

Defeat Kid Tannen.

Find a hidden passageway.