Me and my little brother played this RPG Shooter where I was this double shooter cowboy (not sure if it was a cowboy) and my brother played a beefy white guy who shot slow bazooka like weapons. You fight your way through tons and tons of monsters in a maze like surrounding and while you kill them you get certain powerups like speed boost I think or increased damage and life.... maybe ammo i think? But as you kill'ed you level'd up as well and maybe you had to buy your upgrades?? I also think that you could pick between 5 characters but I was always the cowboy. It's been so long and if any of this is familiar to you guys LET ME KNOW!!