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