Follow the yellow C that appears in the map to start the cut scene in which Trevor is distraught to learn that the Cheng Group wants to go down a "different path" with the O'Neil brothers.
before heading out, ensure that you still have a Sniper Rifle equipped with Advanced Scope and Supessor, if not then stop by an Ammu-Nation before heading to the objective. Follow the trail to the east side of Grapeseed. On the way there Trevor will recieve an apologetic phone call from one of the O'Neil brothers, saying that it "was just business". At this Trevor rages to the point where his special ability bar increases at double rate.
Follow the route that leads to the farm entrance, before the gates the track veers off to a destination marker to the right. Follow the blip onto the vantage point.
From the vantage point, with Sniper Rifle in hand, start to shoot the O'Neils. Two are taking target practice down near the equipment garage,; others stand in groups around the farm house and on its balconies. If you shoot one of the red canisters, it will take out a number of brothers but they will be alerted to your presence and advance toward your position. Otherwise, continue to shoot.
TipOne of the Gold Medal Requirements is to kill two enemies with one shot. From the vantage point, target the two brothers in alignment with the second-floor balcony of the farm house. Two others will be lined up perfectly at the front of the house. You can also shoot a red canister near the two brothers next to the equipment garage.
Once all the red dots on the minimap are gone, advance toward the farm house, entering via the equipment garage and take cover at the far end, Kill the unsuspecting brother, this will alert the others. Remain in position until the other brothers are no longer advancing, and move up the building in a similar fashion. Be wary, however, as some have shot guns that can seriously deplete Trevor's health. Find the stair case leading to the meth lab (downstairs) and deal with the O'Neil pleading. Once he is dead, take the Jerry Can and pour it up the stairs and all the way through the house.
Once outside and the trail of gasoline is set, light it up by firing a gun at it. After the farm house has blown up, leave the area.
 Conditions for failure
- Trevor dies
- Headshots: Kill 10 enemies with a head shot
- Unmarked: Complete with minimal damage to health and armor
- 2 Birds, 1 Stone: Kill 2 enemies with one shot
- Accuracy: Finish with a shooting accuracy of at least 80%