Here is the full list of all 30 The Dark Pictures Anthology: Man of Medan achievements.
No-one survived!
Chose all of the Head decisions
Found all Secrets!
Unlocked Conrad's Humorous Trait
Found all of the black framed Pictures
Found all Pictures
Found all of the white framed Pictures
Unlocked Fliss's Arrogant Trait
Unlocked Alex's Aggressive Trait
Maxed Conrad and Fliss's Relationship
Conrad successfully flirted with Fliss
Conrad successfully escaped on the speedboat
Opened the window without making noise
Finished Movie Night
Everybody survived!
Completed the Solo Story
Only the women survived!
Only the men survived!
Chose all of the Heart decisions
Calmed Junior down
Completed 10 QTEs in succession
Found 25 Secrets!
Unlocked Julia's Spoilt Trait
Julia accepted Alex's proposal
Maxed Brad and Alex's Relationship
Beat the Training Dummy
Finished the Shared Story
Revealed the name of the ship
Maxed Alex and Julia's Relationship
Unlocked Brad's Envious Trait