Here is the full list of all 22 Demon Hunter 4: Riddles of Light achievements.
Save the world.
Finish all Minigames without skipping them.
Collect all collectible Stars and Diamonds.
Find all parts of Horus' soul.
Answer all of Sphinx's questions correctly.
Find the gate to the Dreamatorium.
Defeat the Undead King.
Travel with Bennu to the Rose of War to find a way to the Dreamatorium.
Escape Seth's dungeon and reach the surface.
Pass all the traps on the bridge and live to tell the tale!
Use the Gauntlet to talk to the mummy for the first time.
Find the upgrade for your Gauntlet.
Finish 3 Hidden Object Puzzles without a Hint.
Complete a Hidden Object Puzzle in less than a minute.
Complete 5 Minigames without skipping them.
Complete a Hidden Object Puzzle without a mistake.
Complete a Hidden Object Puzzle without a Hint.
Find 3 Hidden Objects within 3 seconds.
Find and use the Gauntlet for the first time.
Complete a Minigame in less than a minute.
Complete your first interactive Hidden Object Puzzle as an archaeologist.
Find one Collectible.