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