Here is the full list of all 76 Duet achievements.
The base game contains 66 achievements, and there is 1 DLC pack containing 10 achievements.
Beat all of "identity" without hitting a wall.
Beat all of "understanding" without hitting a wall.
Beat all of "revolution" without hitting a wall.
Beat all of "anticipation" without hitting a wall.
Beat all of "guilt" without hitting a wall.
Beat all of "initiative" without hitting a wall.
Beat all of "control" without hitting a wall.
Beat all of "trust" without hitting a wall.
Beat all of "hope" without hitting a wall.
Beat all of "depression" without hitting a wall.
Beat "resilience".
Beat "quickening".
Beat five advanced daily challenges.
Get at least 250 in infinite mode.
Get at least 750 in infinite mode.
Earn at least 1500 in infinite mode.
Beat all of "bargaining" without hitting a wall.
Beat all of "anger" without hitting a wall.
Beat all of "denial" without hitting a wall.
Beat all of "ignorance" without hitting a wall.
Beat "revolution".
Beat "release".
Beat ten daily challenges.
Beat "perspective".
Beat "tension".
Beat "ambition".
Beat seven daily challenges in a row.
Beat the game and watch the end sequence credits to the end.
Beat "anticipation".
Beat "integrity".
Beat "intimacy".
Beat "initiative".
Beat "identity".
Beat "control".
Beat "understanding".
Beat "trust".
Beat "acceptance".
Successfully navigate invisible blocks.
Beat "hope".
Beat three daily challenges in a row.
Beat "depression".
Beat "guilt".
Beat "bargaining".
Beat one daily challenge.
Beat "anger".
Try the infinite mode.
Beat "denial".
Fail 10 times in a wave before completing it.
Successfully spin around a rotating block.
Beat "ignorance".
Beat the first wave.
Beat "transcendence".
Beat all of "acceptance" without hitting a wall.
Beat all of "resilience" without hitting a wall.
Beat all of "quickening" without hitting a wall.
Beat all of "transcendence" without hitting a wall.
Beat all of "intimacy" without hitting a wall.
Beat all of "integrity" without hitting a wall.
Beat all of "ambition" without hitting a wall.
Beat all of "tension" without hitting a wall.
Beat all of "perspective" without hitting a wall.
Beat all of "release" without hitting a wall.
Beat 100 daily challenges.
Beat "continuance" wave 10.
Beat "continuance" wave 100.
Beat "continuance" wave 1000.
Beat "confusion".
Beat "relief".
Beat "resentment".
Beat "reunion".
Beat "reintegration".
Beat all of "confusion" without hitting a wall.
Beat all of "relief" without hitting a wall.
Beat all of "resentment" without hitting a wall.
Beat all of "reunion" without hitting a wall.
Beat all of "reintegration" without hitting a wall.