Editing Player versus environment (section)

==Examples==
''[[Guild Wars]]'' narrates its story by displaying in-game [[cut scene]]s and dialogue with [[non-playable character]]s (NPCs). To enhance replayability, missions can often be completed many times. Characters playing in this mode are often protected against being [[Player killer|killed by other players]] and/or having their possessions stolen. An example of a game where this is not the case is ''[[Eve Online]]'', where players can be, and often are, ambushed by other human players [[player versus player]] while attempting to complete a quest. 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.