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