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