Here is the full list of all 2448 Zup! 6 achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Open level T
Pass the level S!
Pass the level R!
Open level S
Open level R
Pass the level Q!
Pass the level P!
Open level Q
Pass the level O!
Open level P
Pass the level N!
Open level O
Pass the level M!
Open level N
Open level M
Pass the level L!
Pass the level K!
Open level L
Pass the level J!
Open level K
Open level J
Pass the level I!
Pass the level H!
Open level I
Pass the level G!
Open level H
Open level G
Pass the level F!
Click on ❤
Click on ❤!
Open level F
Pass the level E!
Open level E
Pass the level D!
Pass the level C!
Open level D
Pass the level B!
Open level C
Click on ⚙
Pass the level A!
Open level B
Open level A
Click on Zup! in Main menu
Click on ⬥ in Main menu
Pass the level T!
Open level U
Pass the level U!
Open level V
Pass the level V!
Open level W
Pass the level W!
Open level X
Pass the level X!
Open level Y
Pass the level Y!
Open level Z