 Halo 3 is a shooter game where players primarily experience gameplay from a first @-@ person perspective . Much of the gameplay takes place on foot , but also includes segments focused on vehicular combat . The balance of weapons and objects in the game was adjusted to better adhere to the " Golden Triangle of Halo " : these are weapons , grenades , and melee attacks , which are available to a player in most situations . Players may dual @-@ wield some weapons , forgoing the use of grenades and melee attacks in favor of the combined firepower of two weapons . Many weapons available in previous installments of the series return with minor cosmetic and power alterations . Unlike previous installments , the player 's secondary weapon is visible on their player model , holstered or slung across the player 's back . 
