Here is the full list of all 21 Dark Nights with Poe and Munro achievements.
You played the cat sound effect!
You let Poe do the talking.
You wished for love over intellect.
You rocked rock, paper, scissors!
You copied Munro's work.
You played the first episode. Don't stop now!
You destroyed the evidence.
You got Poe and Munro to sing a song.
You left Poe for dead.
You got Poe and Munro to dance.
You raised Violet's suspicions.
You used Munro's safeword.
You asked everyone about the whistle, but you're none the wiser.
You did a very very bad job of saving Joe.
Elizabeth got what she wished for.
You left Kasper with no other choice.
You got Poe and Munro to kiss and make up.
You made all nine callers disappear.
You gave Poe a taste of his own medicine.
Poe and Munro chose the same number of books.
You played all six episodes. Our hero!