Here is the full list of all 24 12 Labours of Hercules XIV: Message in a Bottle achievements.
Stop the clock with a bonus after completing a level
Remove 4 obstacles using the 'Work Faster!' bonus
Finish level in Expert Mode and Gold Time having 3 seconds left
Complete four bonus levels in Gold time
Find 5 puzzle pieces
Remove 30 interactive objects (sheep, bushes etc.)
Activate the 'Run Faster!' bonus with a complete Hermes' Obelisk
Beat a Developer's Record 3 times
Beat a Developer's Record 20 times
Collect resources 100 times or more from respawn points
Earn every achievement
Complete all levels in Gold time
Collect 100 resources with Plutus' Obelisk
Complete 20 levels in Gold time
Activate 3 any boost boxes at the same time
Use 2 different bonuses together
Activate bonus and boost of the same type together
Use the same bonus again before its time runs out
Call upon 3 different characters simultaneously
Complete a level in Gold time without using any bonuses
Workers must collect one resource after all the objectives are met
Complete 5 levels in Gold time
Build 3 obelisks on a single level
Activate 2 boosts of the same type together