It was 25 years ago this month that one of the most important strategy games in video game history first debuted. Do you know which game this is?

Warcraft: Orcs and Humans first arrived for MS-DOS in November 1994, and its fantastical take on real-time strategy helped set the standard for virtually every other RTS title that’s followed. Developed by Blizzard Entertainment, the game would help put the company on the map especially as the genre boomed in the late 1990s.

As a real-time strategy title, Warcraft put players in control of one of two possible factions – either the Human populace of Azeroth or the invading Orc forces. The single-player mode allowed players to work through a variety of missions in order to build up their armies and lead them to victory. Given the fantasy-forward setting, the units included spellcasters in addition to standard melee and ranged forces.

Warcraft boasted a full single-player mode, but also featured multiplayer capabilities through the use of local networks. Multiplayer matches featured a random map generator, and could even allow players on MS-DOS and Macintosh interfaces to play against each other. It was the multiplayer functionality that helped push much of the popularity of Warcraft – though other RTS titles had existed before Warcraft, the multiplayer appealed to a far wider audience than these other games were able to attract.

The game’s success led to a sequel the following year, Warcraft II: Tides of Darkness, which would see even larger acclaim than the original. The Warcraft series competed with Westwood’s Command and Conquer RTS series, spurring a boom in the real-time strategy genre by the late ‘90s. Blizzard continued the success in the genre with Starcraft before the end of that decade, and Warcraft would go on to be the basis for the enormously-popular massively-multiplayer online role-playing game, World of Warcraft.