Hell's not all that nice a place for the living. Especially since the lost souls there tend to enjoy flaying the skin off anyone who happens to enter the gates. Fortunately, there's a neighborhood gun shop, and you earn money for blasting away those unfortunate souls who attack you. The better you are, the more ammo you get -- and you'll learn pretty quickly what ammo to use on which evil souls. Oh, and a word of advice: wait for your shot. The red dot in your target area will show you where the shot is going to hit. Try to save your more expensive ammo for the hardest enemies.