During missions, the health, shields and weapon energy (which functions in the place of specific ammunition) of the player's agents will recharge over time. New weapons can be acquired either by picking them up during missions, or by completing research (which is also used to upgrade agents' cybernetic components). Weapons available early in the game include uzis (the default weapon), miniguns, and flamethrowers; however, later stages of the game introduce directed-energy weapons, such as the pulse laser, electron mace, plasma lance, and graviton gun. Other items of equipment available include rocket launchers, gas grenades, explosives, armed drones, and equipment to direct orbital bombardment from satellites.