The Ruin

"After the events of the ruin, the simulations were created protected by the boundery"

- The very first thing the player saw when booting up plague for the first time

The Ruin happend before the events of plague all we know is there was some sort of war and we lost the other team released a plague to kill us off but The Creators blocked it off with The Boundary, but the plague broke through. But during the season 18 event the boundery sent you (the player) to the ruin and you fought in it to stop the war but it broke the time and space continuim alerting Titianus about The Gamma Rocks existance.