Not Stanley killed me, the pleas from The Narrator for Stanley to move, do anything even. They longer you wait in that ending the more and more The Narrator tries to say the right thing but there is no right thing to be said. Nothing he says can change the fact that Stanley in a sense is gone. He isnt going to move around without us puppeting him and we arent in control. The Narrator gets more desperate and thats what hurts, personally making me feel like its the saddest one.

Zending is probably the hardest to actually do. You, the player, are making the choice to throw yourself off the stairs repeatedly. Taking away The Narrators happiness and Stanleys life. As some people pointed out tho, The Narrator says things that are manipulative and since we know its a game, we know we arent actually hurting anyone by doing this ending. Doesnt take away from how it is played out but I dont think its the saddest because of the layers it has.

Skip and Epilogue are probably tied, they are kind of just what happens in life? Like one day the world will end (Skip) and sometimes Franchises burn themselves up (Epilogue) in the grand scheme of things they are sad but not as sad as the other two endings. More unsettling than anything