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 100 daily challenges.
Beat five advanced daily challenges.
Beat ten daily challenges.
Beat all of "transcendence" without hitting a wall.
Beat seven daily challenges in a row.
Beat all of "quickening" without hitting a wall.
Beat all of "release" without hitting a wall.
Beat all of "perspective" without hitting a wall.
Beat all of "tension" without hitting a wall.
Beat all of "ambition" without hitting a wall.
Beat all of "anticipation" without hitting a wall.
Beat all of "integrity" without hitting a wall.
Beat all of "intimacy" without hitting a wall.
Beat all of "initiative" without hitting a wall.
Beat all of "identity" without hitting a wall.
Beat all of "control" without hitting a wall.
Beat all of "understanding" without hitting a wall.
Beat all of "resilience" without hitting a wall.
Beat all of "revolution" without hitting a wall.
Beat three daily challenges in a row.
Beat all of "acceptance" 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 all of "guilt" without hitting a wall.
Beat all of "bargaining" without hitting a wall.
Beat all of "anger" without hitting a wall.
Earn at least 1500 in infinite mode.
Beat "transcendence".
Beat all of "denial" without hitting a wall.
Beat the game and watch the end sequence credits to the end.
Beat "resilience".
Beat "quickening".
Beat "revolution".
Beat "release".
Beat "perspective".
Beat "tension".
Beat "ambition".
Beat "anticipation".
Get at least 250 in infinite mode.
Get at least 750 in infinite mode.
Beat "integrity".
Beat "intimacy".
Beat "initiative".
Beat "identity".
Beat "control".
Beat "understanding".
Beat "trust".
Beat one daily challenge.
Try the infinite mode.
Beat "acceptance".
Fail 10 times in a wave before completing it.
Successfully navigate invisible blocks.
Beat "hope".
Beat "depression".
Beat "guilt".
Beat "bargaining".
Beat "anger".
Beat "denial".
Successfully spin around a rotating block.
Beat "ignorance".
Beat all of "ignorance" without hitting a wall.
Beat the first wave.
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.