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