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.
StarCraft (video game)
"StarCraft" was released internationally on March 31, 1998 and became the best-selling PC game for that year, selling over 1.5 million copies worldwide. In the United States, it was best-selling computer game of 1998, with 746,365 units sold. It was the country's 14th best-selling release of the period between 1993 and 1999, selling 916,000 copies. By April 1999, South Korean players had purchased almost 300,000 units of the game. "StarCraft"s worldwide sales reached 4 million units by July 2001; South Korea accounted for 50% of these copies. By May 2007, "StarCraft" had sold over 9.5 million copies across the globe, with 4.5 million of these being sold in South Korea. Since the initial release of "StarCraft", Blizzard Entertainment reported that its Battle.net online multiplayer service grew by 800 percent.