How do you get all three protagonists killed in gta v?

The only verified source supplied describes the game's setting, characters, and general gameplay mechanics, but it does not mention any event, mechanic, or plot twist that would result in the deaths of Michael, Franklin, and Trevor simultaneously. Without additional, corroborated information, there is no basis to describe a method to kill all three protagonists in Grand Theft Auto V. If you are seeking spoilers or detailed storyline outcomes, please consult a dedicated game guide or walkthrough that specifically covers end‑game events.