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.
Score a direct hit on an enemy boulder with the Castlepult.
Beat the game in Story mode.
Win a match using the Snowball boulder.
In SkeeBoulder, land your Boulder in the maximum multiplier.
Land a projectile on some TNT to produce a shockwave combo that hits your enemy.
Earn more than 7000 gold in one match.
Win a War game using the Cube.
Destroy a flying ship.
Hit the castle gate with the fireball powerup.
Win an online War game
Win a match with your gate unscathed.
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.
Break off the first layer of your adversary’s boulder.
Complete the tutorial level and escape from the underworld.