Here is the full list of all 21 Oneiros achievements.
Seen every movie at the Cinema.
Finished the Arcade Game.
Pulled out the "Cuckoo".
Gave the bird all snacks.
Found the Egg.
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 cooked the fuel, OMG.
You've fixed the car!
Reached an agreement with the Bird.
Charged the battery full.
Well, you've catched a rat.
Managed to get on the other island.
Finally, it's open!
Finished the Unicorn game.
Scored 5000 points in Miami Street Skater 3.
Found all anatomy books.
Logged into the laptop.
Found all gameboxes in the room.