Here is the full list of all 21 Oneiros achievements.
Finished the Arcade Game.
Seen every movie at the Cinema.
Where am I?
You flushed the toilet, well done.
Is there anyone on board who can fly this thing?
Unlocked all combination locks.
You've fixed the car!
You've cooked the fuel, OMG.
Charged the battery full.
Well, you've catched a rat.
Found the Egg.
Managed to get on the other island.
Pulled out the "Cuckoo".
Gave the bird all snacks.
Reached an agreement with the Bird.
Finally, it's open!
Found all anatomy books.
Finished the Unicorn game.
Scored 5000 points in Miami Street Skater 3.
Logged into the laptop.
Found all gameboxes in the room.