Laptop is why and you have not used this version which is different because it is not approved yet . I think you mean the other version .
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Guys in last man standing press numpad 1 then numpad 3 and numpad 4 works great . But wait till you have a gun . PS You do not need ammo as soon as you get a gun is will fire and do not pick up ammo . That will make you have to reload .