The State of the Milky Way Galaxy Before Mass Effect 4

The original Mass Effect trilogy is among the most fondly remembered RPGs of all time, largely in part due to its expansive universe, and the characters that reside in it. Over the course of three games, Mass Effect manages to flesh out its universe in subtle and interesting ways, eventually forming a Milky Way galaxy that is totally different from its real-world counterpart, but definitively memorable.

Source: Gamerant