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