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