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