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

Use the DeLorean parts to enter Hill Valley.

Defeat Kid Tannen.

Find a hidden passageway.

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

Use the Co-op overload to kill 60 enemies.

Defeat Matthew Patel without losing a life.

Buy all of the weapons.

Defeat Commander Spog.

Track down a missing accountant.

Revive a teammate with one second left on their timer. (2P +)

Buy half of the weapons.

Acquired Emmett's Rocket Drill