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