Here is the full list of all 1500 Neon Hardcore achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Open level 1
Open level 2
Symbol
Open level 3
NEW_ACHIEVEMENT_DESC_7_27
Russian letter
Open level 4
Open level 5
NEW_ACHIEVEMENT_DESC_16_20
Open level 6
Open level 7
Open 7
Open level 8
Open level 9
Open level 10