Resident Evil 4 Good Weapon Case Guide A good case is a Mine Thrower,Rocket Launcher,Striker with good upgrades,Red9 with good upgradesincluding the exclusive upgrade,Broken Butterfly or Killer7,Lots of Ammo, First Aid Spray And Herbs And Combined Herbs Potion.Try And Get All The Best Upgrades On All Guns Mostly The Red9 And Striker. You get the exclusive upgrade when you have ALL the other upgrades for the weapon.