Here is the full list of all 32 Inline achievements.
Reach a combo of 4
Drop a shape outside of the grid
Find every easter egg
Rotate a shape that will not change the orientation
Type RAIN at the main menu and let the rain work its magic
Lose with no lines cleared
Spin one shape 20 times
Push an AI to crash the game
Try to access debug features and meet their guardian
Click and hold main menu title for 5 seconds
Find the option hidden in the options menu, and enjoy them "soft-body physics"
Skip when no more skips are left
Skip a single block
Completed 3 lines in 9 moves
Repeatedly press ESC at the main menu to display the game with inversed colors
Beat your own highscore 3 times
Reached more than 9000 score in total
Reach max level 10
Play Custom Mode
Use the Gameboy command in the console and enjoy tastelessly emulated graphics from the past
20 skips used
Reach level 5 without skips
Reach streak of 3
50 lines cleared in one session
Reach combo of 3
Reach level 5
50 shapes placed
Lose after using 5 skips in a row
Play 20 normal games
1000 lines cleared
Reach streak of 5
Reach 600 score in 50 moves