The Protheans, an ancient and advanced alien civilization, play a pivotal role in the Mass Effect 3 narrative. Their legacy is discovered through various artifacts, data logs, and ruins scattered across the galaxy. The Protheans were a highly sophisticated race that developed advanced technology, including the Mass Relays and the Crucible, a weapon designed to combat the Reapers. Their influence is felt through their technological remnants, their historical records, and their ultimate sacrifice in attempting to warn future civilizations of the Reaper threat. Studying Prothean ruins and deciphering their data often provides crucial insights into Reaper weaknesses, the nature of the Crucible, and the history of the galaxy. Understanding their fate and their final efforts is key to understanding the current conflict and Shepard's mission to unite the galaxy.

The Prothean Legacy and Its Influence — Mass Effect 3 Walkthrough