One of the most pleasant aspects of the quest system in WoW is the fact that most of them can be done in the space of half an hour. This allows casual gamers to actually play in a genre that was once limited to gamers who could afford to spend several hours online at a time. In today's busy world, even the most die-hard gamers have lives and responsibilities. With this in mind, Blizzard has created a game that appeals to not only the hard-core, but the casual. To even further this quest brevity, there is the Rest XP system. This allows players who have been away from the game for extended periods of time to progress at an accelerated pace to catch up to their friends. This is achieved by virtue of doubling experience points gain for monster kills for a certain amount of experience points. The longer a player is away from the game, the more this limit of double xp points grows. However, at no given time can a player accrue more than a level and a half worth of this Rest XP "state."

  As an extension of the quest system, World of Warcraft is home to almost thirty unique and massive instanced dungeons. Namely, an "instance" is a private version of that dungeon that is created for you and your party upon entering the dungeon抯 portal. This eliminates problems with competing for quest related monsters, bosses and loot. By giving each team or raid group a private dungeon, they can adventure without the hassle posed by too many additional people in the area. While these instances are private, they are by no means random ?Blizzard has orchestrated many scripted events and climactic boss showdowns that involve the environment that would be ruined by random map generation. There are three flavors of these dungeons found in Azeroth ?the first and most common is the single party instance. The single party instance is designed with a balanced five-man party in mind, with quests and challenges for a single band of players.