Here is the full list of all 16 Agent Walker: Secret Journey achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Find all the miniatures.
Find and complete all collections.
Solve all the Minigames without using Skip.
Finish a Hidden Object Scene without a mistap.
Destroy the Spear.
Finish all Hidden Object Puzzle without using Hint.
Find five items in Hidden Object Puzzle in five seconds.
Find three items in Hidden Object Puzzle in three seconds.
Complete all the uniforms.
Find all the figurines.
Watch all Cutscenes without skipping.
Solve three Minigames in less than ten minutes.
Solve a Minigame in under a minute.
Solve three Minigames without skipping.
Finish a Hidden Object Puzzle without a hint.
Solve a Minigame without using Skip.