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 II: Wings of Liberty
StarCraft II: Wings of Liberty is a science fiction real-time strategy video game developed and published by Blizzard Entertainment. It was released worldwide in July 2010 for Microsoft Windows and Mac OS X. A sequel to the 1998 video game "StarCraft" and its expansion set "", the game is split into three installments: the base game with the subtitle "Wings of Liberty", an expansion pack "", and a stand-alone expansion pack "". In March of 2016, a campaign pack called was also released.