World of Warcraft
"World of Warcraft" was first announced by Blizzard at the ECTS trade show in September 2001. Released in 2004, development of the game took roughly 4–5 years, including extensive testing. The 3D graphics in "World of Warcraft" use elements of the proprietary graphics engine originally used in "Warcraft III". The game was designed to be an open environment where players are allowed to do what they please. Quests are optional and were designed to help guide players, allow character development, and to spread characters across different zones to try to avoid what developers called "player collision". The game interface allows players to customize appearance and controls, and to install add-ons and other modifications.
World of Warcraft: Wrath of the Lich King
World of Warcraft: Wrath of the Lich King is the second expansion set for the massively multiplayer online role-playing game (MMORPG) "World of Warcraft", following "". It launched on November 13, 2008 and sold 2.8 million copies within the first day, making it the fastest selling computer game of all time released at that point. The game added a substantial amount of new content into the game world, including the new continent of Northrend, home of the eponymous Lich King and his undead minions. In order to advance through Northrend, players are required to reach at least level 68 and the level cap for the expansion is 80. The first hero class was introduced, the Death Knight, that starts at level 55.