Seven expansions have been released: The Burning Crusade, released in January 2007; Wrath of the Lich King, released in November 2008; Cataclysm, released in December 2010; Mists of Pandaria, released in September 2012; Warlords of Draenor, released in November 2014; Legion, released in August 2016; and Battle for Azeroth, released in August 2018. Players are not required to purchase expansions in order to continue playing; however, new content and features such as higher level caps and new areas may not be available until they do so.
Before the introduction of World of Warcraft's seventh expansion "Battle for Azeroth", both "Normal" and "RP" servers were each divided into two separate categories; PvE and PvP servers. This has since been removed after the implementation of the "War Mode" option, which allows any player (of level 20 and higher) on any server to determine whether they want to actively participate in PvP combat or not, by enabling War Mode in two of the game's capital cities.
Un concepto de elfo original en los elfos nocturnos, que son de tez violácea clara, y de estatura no menor a los 1,90 metros,12 cuando la literatura moderna en su lugar los concibe de tez blanca, delicados y muchas veces de una estatura decididamente inferior a la media humana. Estos últimos, en Warcraft, son los descendientes de los nobles elfos de la noche que siguieron el camino de la magia a costa de su inmortalidad y de aquellos caracteres físicos.
World of Warcraft runs natively on both Macintosh and Windows platforms. Boxed copies of the game use a hybrid CD to install the game, eliminating the need for separate Mac and Windows retail products. The game allows all users to play together, regardless of their operating system. Although there is no official version for any other platform, support for World of Warcraft is present in Windows API implementations Wine and CrossOver allowing the game to be played under Linux and FreeBSD. In addition, the Windows client allows for direct OpenGL rendering in Wine, making performance on Unix-like platforms comparable to the native performance seen on Windows. While a native Linux client is neither released nor announced by Blizzard, in January 2011 IT journalist Michael Larabel indicated in a Phoronix article that an internal Linux client might exist but is not released due to the non-standardization of the Linux distro ecosystem.