Vigilante

Vigilante Missions are Side Missions in GTA III Era games, where the player chases and kills criminals. Vigilante mode can be activated at any time (when not in a mission) from within a Law Enforcement vehicle, such as a Police Car). Brown Thunder is a separate but identical side mission, activated from a Hunter helicopter.

The criminals are in a vehicle (clearly marked and shown on the radar) which attempts to evade the player when in pursuit. If the vehicle is on fire, the occupants will bail out and run individually. To win the level, the player must kill all the criminals from the car, whom are shown on the radar. Higher levels provide better rewards, but involve higher numbers of criminals, armed with better weapons. Completion to Level 12 is a requirement for 100% completion.

The mission is failed if the player remains outside of a Law Enforcement vehicle for more than 30 seconds in one go, or if the player dies or is busted. Vigilante mode does not grant immunity from the Police, who will often pursue the player for murder, firing weapons, hitting police cars etc. Each time a Vigilante mission is started, the player must begin at Level 1, and cannot continue a previously failed or cancelled mission.