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