Harvest some leather.

Punch a tree until the block of wood pops out.

Destroy all motorcycles.

Use a wrecking ball to kill an enemy.

Break both elevator window panes.

Achieve an "Amazing!!" combo.

Break a wine bottle.

Meet Adam.

Use a barrel or a grenade explosion to kill 3 enemies at the same time.

Break the car in The Streets.

Achieve a "Super!" combo.

Comeback and win when trailing by 17+ points at halftime.

Win a MUT Ultimate Challenge.