To get both Bad and Good Endings, make another Save after Memory Lane. To get all 4 endings without replaying, make sure to keep a save before the Basil sleepover, or RIGHT after omori wakes up but before you do anything else at all.
The Normal Route has the Good, Bad, Other endings, and an unlisted Knife Ending with no corresponding achievement, 4 total variations. Mari knocks the first Real World segment, but can be let in or ignored with no lasting effect. To play the Normal Route, simply answer the door when Kel comes to visit in the “Real World” segments (Three Days Left), ideally on both days. If you’re trying to make a save before the split, it’s at the Three Days Remain segment after beating Space Boyfriend, but you should probably just play Normal Route and do a whole fresh playthrough since certain things will make a lot more sense after watching all the Normal Endings.
