This article refers to the multiplayer system. For the trophy of the same name, see Buddy System (trophy).
At the start of each match, players will be randomly assigned a buddy; a member of their team with whom they can work to earn extra rewards. A player can also buddy up with a person of their choosing by high-fiving another player. These rewards range from the ability to pick up each treasures for each other, to special taunts that can be performed over the bodies of enemies that they kill together. There are also several buddy specific boosters, which allow buddies to share rewards such as cash and ammunition. If the player dies, he or she has the option of spawning close to his or her buddy or the player can choose to spawn some place random on the map.