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