Reaper Invasion Begins

Lore & Background

The invasion follows a precise pattern established over more than one billion years by the Catalyst, an artificial intelligence created to resolve the conflict between organic life and their synthetic creations. The Reapers do not refer to themselves as such; that name was given by the Protheans in the preceding cycle. Upon invading through the Citadel, they execute a decapitation strike on leaders and population centers, then isolate star systems by controlling the galaxy-wide mass relay network. They hunt down survivors using records kept at the Citadel while engaging the remnants of civilization in a war of attrition. The Reapers utilize indoctrination to brainwash organic life and subvert synthetics through a galaxy-wide code broadcast. Their ground forces consist of synthetic-organic creatures like husks, formed from harvested human bodies impaled on structures called 'dragon's teeth,' as well as twisted versions of other species including Asari, Batarian, Krogan, Turian, and Rachni.

In Their Own Story

The invasion began with the Reapers emerging through the Citadel to deliver a decapitation strike against Earth and major population centers. Sovereign, first mentioned in the 2007 novel Mass Effect: Revelation, and Harbinger, who leads the invasion on Earth during Mass Effect 3, spearhead this assault. The narrative reveals that the Reapers have never needed to defeat a civilization they could persuade to surrender; instead, they rely on indoctrination to control organic minds and subvert true synthetics digitally. In dialogue with Commander Shepard, Sovereign explains their role as both creator and destroyer, aware that the only way to control organic life is to direct its outcome. The invasion forces former rivals into an alliance against a foe that views organics merely as genetic material to be absorbed into new lifeforms, preserving them forever in a cycle of harvesting at their peak before they create synthetic life that turns on their creators.

Reader's Guide

Survival depends on understanding the Reapers' reliance on the Citadel and mass relays. The Reapers encourage rising civilizations to establish central governments on the Citadel, making everyone dependent on the relay network they control. To resist, forces must avoid relying solely on these relays and recognize that the Reapers can subtly influence synthetics via a 'Reaper code' broadcast. Ground combat involves facing husks, scions made of multiple strung-together bodies, and Praetorians with visible heads inside their chest cavities. Smaller Reaper variants known as Destroyers, standing 160 meters high with a leaf insect nymph silhouette based on Sovereign's unused design, also land on planets to engage forces directly. The Leviathan DLC reveals that the Reapers' origins lie with the Leviathans and the Catalyst, emphasizing that conflict is inevitable unless organics are harvested at their peak.

Did You Know?

• The Reapers are inspired by H. P. Lovecraft's Cthulhu Mythos deities and the Ur-Quan from Star Control II.
• Harbinger leads the Reaper invasion on Earth in Mass Effect 3, while Sovereign was first mentioned in the 2007 novel Mass Effect: Revelation.
• The Reapers harvest organic civilizations every fifty-thousand years to prevent them from creating synthetics that destroy their creators.
• Destroyers are smaller versions of Reapers standing 160 meters high, designed with a leaf insect nymph silhouette based on unused concepts for Sovereign.
• The term 'Reaper' was not used by the entities themselves but was given to them by the Protheans in the cycle immediately preceding the current one.