Going Rogue

"Kill 20 criminals during one Vigilante mission."

- In-game description (original version)

"Kill 15 criminals during one Vigilante mission."

- In-game description (Definitive Edition)

Going Rogue is an achievement/trophy in the retired PlayStation 4 version and The Definitive Edition of Grand Theft Auto III.

Acquisition
To acquire this achievement, the player must kill 20 criminals (or 15 criminals in the Definitive Edition) in a row during the Vigilante side mission.