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