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