We've already seen a number of high quality fan tributes to Portal 2 that highlight its end credit music. Yet nothing has come close to the level of sheer, unadulterated cuteness as Khaff3's.

First posted on Reddit by the artist's friend, what was her motivation exactly? Rather simple: "This is my own way to make my thanks to the creators of Portal 2 for making such a WONDERFUL videogame! ♥ THANK YOU SO MUCH! I HOPE YOU LIKE IT! :D"

If they ever do get to see it, they'll more than likely appreciate the sentiment.

[via Khaff3]