Here is the full list of all 31 This Strange Realm Of Mine achievements.
Complete game on Hard
End on the dark pole at the end of the game
End on the middle spectrum at the end of the game
End on the light pole at the end of the game
Complete the game without killing anyone or anything
Deliver a Pizza Box to Brave
End on the darker spectrum at the end of the game
Invite no NPCs to the tavern
Go on an expedition in Losing Control: Bridge
Kill 500 Enemies
Reach The 2nd floor of Confronting Discomfort
Step on Jenny the ladybug, hidden somewhere in Current Events
Climb up on a useless spot in Unexpected Acquaintances
End on the lighter spectrum at the end of the game
Kill Nuchal
Reach Firebreak
D takes over you
Listen to all of Ulrich's dialogue in the Tavern
Read all NPC dialogues in the Tavern
Listen to all of Dogma's dialogue in the Tavern
Listen to all of Jack-Daw's dialogue in the Tavern
Listen to all of Pistil's dialogue in the Tavern
Listen to all of Brave's dialogue in the Tavern
Listen to all of Rat's Poems in the Tavern
Invite all NPCs to the tavern
Find another way around Plethoras in Feed Me Drown Me
Kill 250 Enemies
Stand infront of the fireplace in the Tavern, after Current Events
Jump down into the void in Current Events
Kill 100 Enemies
Kill 50 Enemies