So what actually happened was that as soon as I stopped recording myself with the Karkat baby moment, I just figured out that I could have been moving Vriska and Terezi outside the room too. Along with some tips from the Discord, I replayed the game and have found

• Both their Prospit and Derse have been destroyed

• Terezi gets a dragon robe

• Hella Jeff art is there, as well as a chalk drawing of Terezi and Dave

• Vriska has a Nick Cage Shrine Closet

• There was a battle between Vriska and a monster chess piece

• When Aradia blew up, Feferi was sleeping in the horn pile to find out about Derse, Eridan was doing something on the computer until Rose blew it up (and might start a Spades thing with her??), while Kanaya was talking to Karkat about the Green Sun as an ultimate weapon

• Found the Wand Pile, and sleeping in it is Game Over

• Also found this adorable picture

If I missed anything else, you can let me know in the chat. I just didn’t feel like recording any more than what I did, but I think I got it all.