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