Frenzy

Frenzy is a condition that can be inflicted upon certain creatures in Fallout 3. Robots, ants, and Enclave-controlled Deathclaws have certain body parts targetable in VATS, by skilled sharpshooters, or by explosives. If these parts are crippled, it will cause the target to disregard any friend-or-foe relations and attack everything indiscriminantly. A message notification will inform the player if a target has been frenzied.

Robots
The following robots can be frenzied by targeting and crippling their Combat Inhibitors:
 * Protectrons
 * Mister Handys
 * Mister Gutsys
 * Cerberus, via dialogue with the Robotics Expert perk.
 * Sentry Bots
 * Robobrains

Insects
The following insects can be frenzied by targeting and crippling their Antennae or Brain:
 * Giant ant
 * Fire ant
 * Bloatfly †

Abominations

 * Any Enclave-controlled Deathclaw can be frenzied by targeting and crippling its metal head piece.

Turrets

 * Any Automated Turret can be frenzied by targeting and crippling its Sensor.