WoW Cataclysm

From Blizzard's New MMO Wiki

World of Warcraft: Cataclysm is the third expansion set for the massively multiplayer online role-playing game (MMORPG) World of Warcraft, following Wrath of the Lich King. It was announced at BlizzCon 2009 on August 21, 2009, though details were leaked earlier.

It adds a substantial amount of content to the game world, including two new races (Goblins for the Horde, and Worgen for the Alliance), new race/class combinations, entirely redesigned zones, heroic modes for classic dungeons, flying mounts in Azeroth (previously flying mounts were restricted to the areas of Outland and Northrend), guild leveling and achievements and an increase of the level cap to 85.