Rampage Four starts by approaching two soldiers by a truck on the road near northern Los Santos County. They begin to make fun of Trevor calling him a Canadian tourist. Trevor takes the Grenade Launcher from the truck, and the rampage will begin.
To complete this mission you must kill 35 soldiers. However you need to kill 50 soldiers, destroy 2 tanks and get 6 headshots for a gold.
All this within 3 minutes.
Trevor will be using a grenade launcher and an infinite supply of ammo.
You will also have an assault rifle and grenades available, you will not need the grenades. But be sure to use the assault rifle to get the 6 headshots.
The grenade launcher is the ideal weapon for this rampage, the soldiers will always come in vehicles, and only two times in tanks.
The tanks sound intimidating, but against a grenade launcher with infinite ammo, the tanks don't last long. Just keep shooting the tanks and make sure to not take any hits from them.
Just like the first 3 Rampages, the best advice is to not hide, stay in the open. Trevor's health will be insanely high and he can take a large amount of damage.
Their is no need to run around, stay where you are, the soldiers will all come to you.
Don't stop shooting and Good Luck!