Here is the full list of all 19 Rock of Ages achievements.
Win a War game using the Cube.
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.
Win 10 online War games.
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.
Earn more than 7000 gold in one match.
Hit the castle gate with the fireball powerup.
Score a direct hit on an enemy boulder with the Castlepult.
Win a match with your gate unscathed.
Win a match without destroying any of your adversary's units.
Win an online War game
Destroy your adversary’s boulder.
Break off the second layer of your adversary’s boulder.
Break off the first layer of your adversary’s boulder.
Win a match using the Snowball boulder.
Complete the tutorial level and escape from the underworld.