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