Here is the full list of all 14 The Blackout Club achievements.
Got Killed by the Shape
Revived a suppressed teammate
Bandaged a teammate
Changed your look after a mission
You wear immersive sims like a badge
Finished the Intro
Showed another player your gesture during a mission
Triggered the Shape's angel mode
Captured a Stalker
Submitted a prayer
Maxed out a major power ladder
Got 500 points as a Stalker within a single mission
You know how to play this game
Made the maximum sacrifice