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