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