In The Phantom Pain, players will be taking the role of Snake (also known by his alias Big Boss)22 in a massive collection of open-world environments. The gameplay elements are largely unchanged from Ground Zeroes, meaning that players will have to sneak from several points in the game world, avoiding enemy guards and remaining undetected. Included in Snake’s repertoire are binoculars, maps, pistols, assault rifles and explosives. Players may traverse the game world with vehicles such as cars and tanks, in addition to travelling on foot or on horseback – as certain locations are mountainous, players can opt to do rock climbing as a short cut. They may also call for friendly helicopter support against enemy soldiers in a combat alert or send commandos to scout a target area. Snake can also call on AI companions—including Quiet, a female soldier; and DD, a trained wolf—to assist him in the field.23 The companions' abilities and their effectiveness will depend on the player’s relationship with them..