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