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