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.
Get a gold medal on all maps in Time Trial mode.
Beat the game in Story mode.
Destroy a flying ship.
Win a match with your gate unscathed.
Score a direct hit on an enemy boulder with the Castlepult.
Win a War game using the Cube.
Earn more than 7000 gold in one match.
Win a match using the Snowball boulder.
Win an online War game
Win a match without destroying any of your adversary's units.
Land a projectile on some TNT to produce a shockwave combo that hits your enemy.
Hit the castle gate with the fireball powerup.
In SkeeBoulder, land your Boulder in the maximum multiplier.
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.
Complete the tutorial level and escape from the underworld.