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