How do you get alternate endings (spoilers obviously)

[JFK_360NoScope]

So, I got the default ending where you stop your dad from F***ing your mom and you change your timeline and get a happy ending. But I heard that there were alternate endings so I started looking for a way to get them. I tried doing different options like doing the other choice instead. Then I thought I could stop myself from going forward a week by not time farting in the Mutant Cousin Kyle boss, but then you get forced to do a ultimate time fart which does the same thing. So I kinda give up at finding them myself and I'm just asking if anybody knows how to do it.

(Please Do Not Spoil The Alternate Endings! Just tell me how to get them)

[Ghosthree3]

Pretty sure there are none, this is the first I've heard of them.

[Dav_X_Little]

Only thing I could think off is to never get out of your room the last time you get the chance to.

[Scorpix]

There is only one main ending.

There are few Game Overs hidden during story or around of town.