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