PIC s1 plot: Romulans find a beacon that warns of the coming of a giant tentacled robot because synths might wipe out organics.
ME1: Humans find a Prothean beacon that warns of the coming of the Reapers, giant tentacled robots that exist to prevent synths developing too far and wiping out organics.
It hadn't ripped off the plot to Mass Effect 1.
PIC s1 plot: Romulans find a beacon that warns of the coming of a giant tentacled robot because synths might wipe out organics.
ME1: Humans find a Prothean beacon that warns of the coming of the Reapers, giant tentacled robots that exist to prevent synths developing too far and wiping out organics.