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