Here is the full list of all 15 Demon Hunter 2: New Chapter achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Complete 5 puzzles without skipping them.
Complete a Hidden Object Scene in less than a minute.
Finish 3 Hidden Object Scenes without a hint or misclick.
Finish the story from the TV Minigame.
Finish 3 Hidden Object Scenes in less than 10 minutes.
Complete a Minigame puzzle in less than a minute.
Complete a Hidden Object Scene without a hint.
Complete a Hidden Object Scene without a misclick.
Find 3 hidden objects within 3 seconds.
Complete the engine Minigame without skipping.
Finish all the Minigames without skipping them.
Gather all of the collectable items.
Complete the game.
Finish the pipes Minigame without skipping.
Finish the swap Minigame.