Desert rifle
Good old fashioned violence and well done is what desert rifle is about. Shoot them mother flockers with a pistol or shotgun in the head. If you do prefer a rifle, that option is available. A prefered method is to first buy as many land mines as you can. Then buy as many shotgun shells as you can.
Fighting in the desert with a rifle presents many problems like sand getting jammed in the rifle. Don't let them confuse you, when you see a guy shooting at you, kill him. And shoot everyone near the shooter while you do it. Use the suicide guys on the quads to take out the dudes near them, make them there own enemy. When offered upgrades go for the shooting accuracy.
Desert|Rifle|day 2
Desert|Rifle|day 3
Desert|Rifle|day 4
Gold miner activation code