Hit the castle gate with the fireball powerup.
Get a gold medal on all maps in Time Trial mode.
Break off the first layer of your adversary’s boulder.
Land a projectile on some TNT to produce a shockwave combo that hits your enemy.
Win a match without destroying any of your adversary's units.
Score a direct hit on an enemy boulder with the Castlepult.
Find all the keys scattered throughout the levels.
Break off the second layer of your adversary’s boulder.
In SkeeBoulder, land your Boulder in the maximum multiplier.