Here is the full list of all 21 Rock of Ages 3: Make & Break achievements.
Get a bronze medal in all time trial levels.
Get a silver medal in all time trial levels.
Beat Poseidon in a race.
Defeat Moby Dick
Destroy the enemy boulder using the thundercloud.
Defeat the Vitruvian Man.
Rescue the Dragon.
Win a match of Boulder Avalanche or War without letting the enemy touch your door.
Follow all of Napoleon’s directions in the level editor tutorial.
Get a gold medal in all time trial levels.
Win an online match of War.
Win an online match of Obstacle Race.
Complete all the Humpty Dumpty challenges.
Rate a map from the Community levels.
Collect all the stars from the story campaign.
Land in the highest scoring hole in the Skee-Boulder ramp.
Earn the Squire's medal by climbing up in the ranking system.
Earn the Knight's medal by climbing up in the ranking system.
Earn the Lord's medal by climbing up in the ranking system.
Earn the King's medal by climbing up in the ranking system.
Earn the High King's medal by climbing up in the ranking system.