Warcraft II: Tides of Darkness is the sequel to Warcraft: Orcs and Humans. It was released on 1995 for MS-DOS and Mac OS. It was re-released, along with its expansion pack Warcraft II: Beyond the Dark Portal, in 1999 in a new special Battle.net edition, which expanded the game to support online multiplayer gaming on Battle.net. This is the original 1995 version of Warcraft II, prior to Battle.net integration.