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