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