Here is the full list of all 43 Tetris Effect: Connected achievements.
Earn all achievements.
Achieve Player Level 100.
Earn S Rank everywhere possible.
Earn 100 avatars.
Rotate Tetriminos 100,000 times.
Earn A Rank or higher in all Effect Modes.
Earn a 15 Combo.
Achieve Player Level 50.
Earn 100 T-Spins.
Earn 500 Back-to-Backs.
Clear 1000 Lines total across all Zone visits.
Clear 10,000 Lines.
Earn SS Rank 10 times.
Achieve Player Level 30.
Earn a 10 Combo.
Participate in a Weekly Ritual.
Earn 500 Tetris Line Clears.
Clear Ambient: Sea, Wind, and World modes.
Earn your first SS Rank.
Earn 10 Back-to-Backs in a row.
Discover a land of golden Tetriminos.
Clear 1,000 Infected Blocks in Purify mode.
Earn 100 All Clears.
Earn 10 All Clears.
Play Marathon, Ultra and Sprint modes.
Complete all Areas of Expert Journey Mode.
Earn A Rank or higher in all Areas of Journey Mode.
Enter the Zone for more than 10 minutes total.
.noisnemid desrever gniyonna na ni yalP
Witness a meteor shower in Countdown mode.
Earn 10 T-Spins.
Complete all Areas of Journey Mode.
Clear 18 Lines or more in a single Zone visit.
Earn 50 Back-to-Backs.
Complete Area 4 of Journey Mode.
Clear 1000 Lines.
Earn 100 Tetris Line Clears.
Achieve Player Level 10.
Clear 100 Lines.
Earn 10 Tetris Line Clears.
Complete Area 1 of Journey Mode.
Activate the Zone mechanic.
Clear 12 Lines or more in a single Zone visit.