The Brain of The Many
The many
Enemy Stats
First Encounter Engineering Deck (cutscene)
The Body of the Many
Hit Points 5 (Nerve Cluster)
10 (Defense Node)
100 (Brain)
Speed Immobile
Weakness Anti-Annelid attacks (4x)
Anti-Personnel ammo (2x)
Incendiary attacks (2x)
External Psionic Detonation (2x)
Loot no loot (100%)
The Brain of The Many is The Many's central mind, and the first boss in System Shock 2. The Soldier first encounters the Brain in a hallucinatory sequence on the Engineering Deck, and then when they finally meet in the Body of the Many.


The specifics of the Brain's functions are unknown or unexplained. It is likely that the Brain is the cognitive center of The Many. The Brain itself displays a degree of intelligence, and is aware of the Soldier's actions throughout the game thanks to its psychic link with the Hybrids. The brain also possesses great psionic power, which it uses to protect itself and communicate with the Soldier directly.


The Brain believes that individuality is a weakness and source of conflict, and believes that The Many must bring an end to human conflict by absorbing all life. The Many is not above using violence to ensure the success of its goal - aside from the invasive conversion process that turns humans into shambling hybrids, the Many is also responsible for most of the atrocities aboard the Von Braun, including the creation of the Cyborg Midwives.

The Many displays some hypocrisy: they rail against cybernetics and machinery, yet it was them who informed Marc Miller to create the Cyborg Midwives. The Many hates discord and chaos, yet they incited much death and suffering directly. Likely, The Many perceives its actions as being in the interest of what it considers the greater good.

The Brain is cordial and measured in its communication, and never insults the Soldier directly. Even when angered, the Many leaves the aggression to its hybrids and midwives.


The Brain has no attacks, but is invulnerable to damage until the three defense nodes orbiting it are destroyed. Furthermore, the Brain is guarded by a group of Rumblers, as well as Psi-Reavers, and a unique, powerful Greater Psi-Reaver.

The Psi-Reavers can be finished off easily. Their brain stems are located in the side-chambers of the Brain's room. The Rumblers, however, never stop respawning, so the player must stay on the move to avoid being cornered and ripped apart.

The defense nodes have a puny 10 health points, so the pistol or the shotgun's slugs will be sufficient. After that, any damage-dealing weapon will suffice to take down the Brain. The Brain explodes on death ; this does no damage, but can launch the player quite far, so keeping one's distance is recommended.

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