|After finishing The Big Score, switch to Franklin and go to his house in Vinewood Hills. While there, someone will come to the door and you'll see that it's Devin. You will be presented with a choice between three different outcomes; a choice of A, B, or C. To start this mission, choose the A option.|
Choosing this option will place a "T" marker on your map, so head there to meet up with Trevor. After the cutscene, he will take off, so chase after him. Note that he can't be injured or killed while he's driving, so just keep up with him until you finally get to the oil fields, where Michael will decide to put a stop to his vehicle.
Once the cutscene is over, you can now shoot Trevor, who will be set ablaze and eventually die. If you take too long, Michael will shoot him and the outcome will be the same. Congratulations! You have beaten Grand Theft Auto V.
|If you choose this option as your first choice for the final mission, then Trevor will be unavailable as a playable character for the rest of that save file. Also, you won't be able to hang out with each other. Lester will call you and say that he split Trevor's cut from the last heist between Franklin and Michael.|