The Expanded Universe is basically an expansion into the wide universe of Undertale Rho. It spills into what is happening in the rest of the Milky Way Galaxy. There are two major factions/empires (excluding Humans) within the Milky Way Galaxy, and the Expanded Universe expounds upon the origins of some characters, and other things.

Notable Locations


A vast expanse of basically nothing. The end of Space is just beyond the horizon of the Milky Way Galaxy.

Notable People

  • 41 - Alive

Notable Organizations/Groups

Slekenal Colony

The Slekenal Colony is a colony of the Osteol Empire. It is a very small colony containing only 24 members. The colony is very low on the Empire's priority list as it is with war with the other empire.

Notable People