[2] In survival games a large part may be fighting the elements, controlling hunger and thirst, learning to adapt to the environment and exploration.
The PvE mode may contain a storyline that is narrated as the player progresses through missions.
Guild Wars narrates its story by displaying in-game cut scenes and dialogue with non-playable characters (NPCs).
Characters playing in this mode are often protected against being killed by other players and/or having their possessions stolen.
Some games, such as World of Warcraft, offer the player the choice of participating in open-world PvP combat or doing quests without PvP interruption, by offering players the ability to join servers where PvP is enabled by default, or allowing them to activate temporary "flags" which allow them to attack and be attacked by other "flagged" players for a limited time.