Lure two or more opponents into the trash compactor during any battle in the Scrapyard.
Deliver at least 80 damage in one aerial combo.
Snag the first three powerups in a match before anyone else has a chance to.
Unlock the 1st secret unit
Purchase 25 towers
Upgrade a unit to max level
Max out squad to 6 units
Collect 20 skill-cards
Explode 10 boxes
Kill 100 enemy towers
Added to levels for Little Cannon Aug 13, 2010.