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