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