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