Here is the full list of all 2230 Oik Memory 2 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Pass the level 9!
Pass the any timed level
Learn the tutorial
Go to the settings menu
Pass the level 8!
Open level 9
Open all levels
Pass the level 7!
Open level 8
Pass the level 6!
Open level 7
Pass the level 5!
Open level 6
Pass the level 4!
Open level 5
Pass the level 3!
Open level 4
Pass the level 2!
Open level 3
Pass the level 1!
Open level 2
Pass the level 0!
Open level 1
Pass the level 然!
Open level 0
Pass the level 惘!
Open level 然
Pass the level 已!
Open level 惘
Pass the level 时!
Open level 已
Pass the level 当!
Open level 时
Pass the level 是!
Open level 当
Pass the level 只!
Open level 是
Pass the level 忆!
Open level 只
Pass the level 追!
Open level 忆
Pass the level 成!
Open level 追
Pass the level 待!
Open level 成
Pass the level 可!
Open level 待
Pass the level 情!
Open level 可
Pass the level 此!
Open level 情
Pass the level Z!
Open level 此
Pass the level Y!
Open level Z