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 using the Snowball boulder.
Win a match with your gate unscathed.
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.
In SkeeBoulder, land your Boulder in the maximum multiplier.
Destroy a flying ship.
Land a projectile on some TNT to produce a shockwave combo that hits your enemy.
Destroy your adversary’s boulder.
Earn more than 7000 gold in one match.
Break off the second layer of your adversary’s boulder.
Win a match without destroying any of your adversary's units.
Score a direct hit on an enemy boulder with the Castlepult.
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.