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