The Red Code
The Red Code is the dream world in which Resolutiion takes place. It was most likely initally created by Red, with Blue, Green, and an unidentified fourth individual becoming dreamers sometime after. In what way the dreamers inhabit the Red Code is unclear, as even after Green was removed from his Cradle and killed, and after Blue was deleted from the Red Code by Alibii, both characters still make appearances later on, suggesting that killing a dreamer is not sufficient to remove them from the Red Code entirely.
A line from Mr. Kiepchen states "When the Red Code was created, many cultural references of that time were added as filler." As Resolutiion takes place in 2110 and contains references to 1965's Dune, 1978's Space Invaders, 1980's Pac-Man, 1995's Waterworld, 2003's Carnivale, and 2016's Hyper Light Drifter, among others, the creation of the Red Code presumably happened somewhere between 94 and 145 years prior to the events of Resolutiion.