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.
Beat the game in Story mode.
Win a War game using the Cube.
Win 10 online War games.
Earn more than 7000 gold in one match.
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.
Destroy a flying ship.
Land a projectile on some TNT to produce a shockwave combo that hits your enemy.
Win an online War game
Win a match with your gate unscathed.
Hit the castle gate with the fireball powerup.
Score a direct hit on an enemy boulder with the Castlepult.
Win a match without destroying any of your adversary's units.
In SkeeBoulder, land your Boulder in the maximum multiplier.
Win a match using the Snowball boulder.
Complete the tutorial level and escape from the underworld.