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