Here is the full list of all 20 Lost Lands: The Four Horsemen achievements.
Completed an HO scene with no unnecessary touches.
Completed the main chapter on Hard difficulty.
Collected all the pages from the book of Forgotten Lands.
Collected all Ghost objects.
Assembled the Magic machine.
Completed the mini-game with water level.
Found 3 objects within 3 seconds in HO scene.
Completed the animals mini-game with less than 70 handle turns.
Saved yourself from the dark horseman.
Assembled the mechanical device with gears.
Completed the plates-and-symbols mini-game with no unnecessary touches.
More than 5 minutes were spent in mini-game to complete it.
Completed 3 mini-games in a row without using a Skip.
Completed a mini-game in less than a minute.
Completed the main and bonus chapters without skipping the mini-games.
Completed the main and bonus chapters without using any Hints in the HO scenes.
Completed the main and bonus chapters without skipping any dialogue or videos.
Completed the main and bonus chapters without using any Hints.
Completed an HO scene in under 2 minutes.
Restored the dwarf mosaic in less than 1 minute.