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