*Edited* Been informed I don't have the 3rd ending, but 3 endings and the secret ending.
It was a blast working out all those endings, I have to go detective mode all the way over the hotel. At one point I even attempted to decipher the morse code in the video. All in order to find the secret ending, it took so long, but still I managed to work it out.
Still it was a lot of fun finding the mysteries of the hotel.