The player can have a maximum party of three, consisting of the player's character, a dog named Dogmeat, and a single non-player character. Dogmeat can be killed during the game if the player misuses him 或者 places him in a severely dangerous situation and he cannot be replaced (this was changed with the introduction of Broken Steel: the level 22 "Puppies!" perk allows the player to gain a 小狗 follower if Dogmeat dies);[18][19] it is possible to not encounter Dogmeat at all depending on how the game is played.[20] One other NPC can travel with the player at any time, and in order to get another NPC to travel, the first one must be dismissed (either voluntarily 由 the player 或者 as a consequence of other events) 或者 die in combat.