Well, haven't heard about 5th one, but I can give instructions on how to get the others:
B: click Momo's mask multiple times until you hear glass shattering sound, when continue clicking on her face
G: wait a few seconds, DON'T CLICK ANYTHING, until "Talk button appears, when have a conversation with her, and continue your run only like that
T: get all the previous endings, including the sex one, start a new run with tutorial, then, on red cloud segment, walk to the right unti you see the big eye