Warcraft II: Tides of Darkness is a fantasy real-time strategy computer game developed by Blizzard Entertainment and released for MS-DOS and Microsoft Windows in 1995 and Mac OS in 1996 by Blizzard's parent, Davidson & Associates. A sequel to Warcraft: Orcs & Humans, the game was met with positive reviews and won most of the major PC gaming awards in 1996. In 1996, Blizzard released an expansion pack, Warcraft II: Beyond the Dark Portal, for DOS and Mac OS, and a compilation, Warcraft II: The Dark Saga, for the PlayStation and Sega Saturn. The Battle.net edition, released in 1999, included Warcraft II: Beyond the Dark Portal, provided Blizzard's online gaming service, and replaced the MS-DOS version with a Windows one.

Battle.net is an Internet-based online game, social networking service, digital distribution, and digital rights management platform developed by Blizzard Entertainment. The service was launched on December 31, 1996, followed a few days later with the release of Blizzard's action-role-playing video game Diablo on January 3, 1997. Battle.net was officially renamed to "Blizzard Battle.net" in August 2017, with the change being reverted in January 2021.