Here is the full list of all 19 Rock of Ages achievements.
Get a gold medal on all maps in Time Trial mode.
Find all the keys scattered throughout the levels.
Win 10 online War games.
Land a projectile on some TNT to produce a shockwave combo that hits your enemy.
Win a match with your gate unscathed.
In SkeeBoulder, land your Boulder in the maximum multiplier.
Win a War game using the Cube.
Win a match without destroying any of your adversary's units.
Beat the game in Story mode.
Destroy a flying ship.
Destroy your adversary’s boulder.
Score a direct hit on an enemy boulder with the Castlepult.
Win a match using the Snowball boulder.
Earn more than 7000 gold in one match.
Win an online War game
Break off the second layer of your adversary’s boulder.
Hit the castle gate with the fireball powerup.
Break off the first layer of your adversary’s boulder.
Complete the tutorial level and escape from the underworld.