Here is the full list of all 19 We Are Not Alone achievements.
Riley is a snoop, and one with great taste!
"yus, didnt u see the horn"
He could've gone in a worse place.
Used the hint system more than 5 times after the tutorial
Found most of the evidence about Osiris and Riley in the bunker.
Heard *something* from the outside world.
Placed your dirty plate in the dishwasher.
Started a fire.
It had to arrive eventually, right?
Turned off Life Support
Cut off the administrator's finger
Got a finger print the "clean" way.
Every possible survivor made it.
No one apart from Riley survived.
Found the alcohol in the first possible location.
Spotted someone familiar during Act Two.
Noticed a change in someone special.
Completed the game on hard mode - or used 5 or less highlights
Fixed the sink.