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