Full list of all 13 Subject 13 achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox One.
You solved the 3 monkeys' enigma. You're a genius!
Better than the company of a ball, you've beaten the jungle with your mind!
You've finished the second chapter. Did you need some fresh air, Subject 13?
You've found half of the testimonies. You still have work to do, Subject 13!
You've finished the first chapter! Of course, that was just a warm-up!
You've found the first testimony in a long series.
You chose to lie. It isn't good to lie, you know.
You chose to talk to the entity and tell it everything. What a gossip!
You have to finish the fourth chapter... Are you sure you want it?
Find all the testimonies... Terrifying isn't it?
Finish the game without using the help... You can do it, Subject 13!
Never use the Skip Puzzle button! Come on!
Finish the final puzzle in less than 20 minutes? Yes, you can do it!