By A Mystery Man Writer
The Reapers are the main villains throughout the entire Mass Effect trilogy, but their history begins long before the events of the first game.
A lot of theories about Mass Effect 4/5, so story and theory wise, what are you expecting/hoping for the new Mass Effect game? : r/bioware
AHL: Timeline (Post-Reaper War), Mass Effect Fan Fiction Wiki
Reapers (Mass Effect) - Wikipedia
Mass Effect - Who MADE the Reapers? (Leviathan EXPLAINED)
Mass Effect timeline, explained - Dot Esports
Alliance War Assets - Mass Effect 3 Guide - IGN
Sovereign, Mass Effect Wiki
Mass Effect timeline, explained - Dot Esports
Top 10 Mass Effect Legendary Edition Mistakes Every Player Should Avoid - Game Informer
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How different would it be if this guy was discovered during the events of Mass Effect 1 by Shepard? : r/masseffect
Universe of Mass Effect - Wikipedia