Okay, this is something that has confused me for a VERY long time: which timeline did gamzee raise Calliope and Caliborn? Which timeline did Alt. Calliope come from? I know it has to be Pre or Post retcon because Calliope managed to kill Caliborn due to not meeting the alpha kids and the lack of technology at hand. It has to be post retcon due to the black hole jack made, but that would mean calliope would come from the post retcon timeline??? Then how could she exist BEFORE the retcon hapened?

Alt Calliope comes from a Doomed Timeline, so the Retcon has no bearing on how she came to be. It’s also arguable Gamzee raises Calliope and Caliborn in ALL the Timelines in which he gets to the Alpha Session, Doomed Timelines not being tied to the Alpha give them a larger range of possibilities, the issue is the Timelines we do see- Game Over Timeline, John Steals The Ring Timeline, and Post-Retcon Timeline, these are all potential sources of some of the Endgame events we’ve seen, but there’s to little information to really pin-point any of them properly.