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 "continuance" wave 1000.
Beat ten daily challenges.
Beat all of "release" without hitting a wall.
Beat all of "perspective" without hitting a wall.
Beat all of "ambition" 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 "transcendence" without hitting a wall.
Beat "continuance" wave 100.
Beat "transcendence".
Beat seven daily challenges in a row.
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 "resilience".
Beat all of "trust" without hitting a wall.
Beat all of "acceptance" without hitting a wall.
Beat five advanced daily challenges.
Beat all of "hope" without hitting a wall.
Beat all of "quickening" without hitting a wall.
Beat "quickening".
Beat all of "depression" without hitting a wall.
Beat all of "guilt" without hitting a wall.
Beat all of "revolution" without hitting a wall.
Beat "revolution".
Beat all of "bargaining" without hitting a wall.
Beat "release".
Beat "perspective".
Beat "tension".
Beat all of "tension" without hitting a wall.
Beat "ambition".
Beat "anticipation".
Beat all of "anticipation" without hitting a wall.
Beat three daily challenges in a row.
Beat all of "anger" without hitting a wall.
Fail 10 times in a wave before completing it.
Beat "continuance" wave 10.
Beat "integrity".
Beat "intimacy".
Beat "initiative".
Beat "identity".
Beat "control".
Beat "understanding".
Beat "trust".
Beat all of "denial" without hitting a wall.
Beat one daily challenge.
Get at least 250 in infinite mode.
Get at least 750 in infinite mode.
Earn at least 1500 in infinite mode.
Try the infinite mode.
Beat the game and watch the end sequence credits to the end.
Beat "acceptance".
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 all of "reintegration" without hitting a wall.
Beat all of "reunion" without hitting a wall.
Beat all of "resentment" without hitting a wall.
Beat all of "relief" without hitting a wall.
Beat all of "confusion" without hitting a wall.
Beat "reintegration".
Beat "reunion".
Beat "resentment".
Beat "relief".
Beat "confusion".