- Kill all fleeing bikers
This challenge is achieved when you go to the biker’s ranch at the end. You need to kill all the red blips on your radar, as well as those that run away at the end. Systematically move round the ranch, clearing out any enemies until the game prompts you to return to Trevor’s truck. At this point, hop onto a bike that has been left, chase down the remaining bikers and kill them.
- Kill 12 enemies with a headshot
Use the pistol to make headshots easier, or if replaying, use an upgraded rifle. Make sure to always aim for the head when you can as there are not a lot of enemies available.
- Complete within 12:00
Skip cutscenes, drive to each location quickly, and take out enemies as fast as possible. There is a bit of room to maneuver but don’t be too wasteful.
- Cause $5000 damage to Ortegas trailer
This one is easy to do. Upon reaching the trailer, simply accelerate the truck into it and keep pushing it all the way down the hill into the river. This leaves it mangled and smashed.
Lost and Damned
- Kill Terry and Clay during the chase
After Trevor arrives to talk to the bikers and they flee to see what mess Trevor has left, you need to put your foot down and gain some ground on them. Use the pistol or another decent gun to shoot both the bikers. Make sure you see the red “X” that shows they’re dead.