Fallout: New Vegas shares a similar skill set to its predecessor, Fallout 3, with the following important differences: Small Guns and Big Guns have been combined into the Guns skill, which now covers all conventional firearms; weapons using explosive ordnance (missiles and grenades, for example) are now covered by Explosives; new throwing weapons (such as the throwing spear) have been added, and are categorized as Melee Weapons; and the Survival skill has also been added to the roster, allowing the crafting of various items such as food, stimpaks, and poisons that augment the effectiveness of weapons.