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