Warcraft II: Tides of Darkness is a fantasy real-time strategy computer game developed by Blizzard Entertainment and released for DOS in 1995 and Mac OS in 1996. 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, provided Blizzard's online gaming service, and replaced the MS-DOS version with a Windows one.