It is the first game in the Warcraft series. It was released in 1994, quickly becoming a best selling game, and was one of the original Real Time Strategy games. It features two races; the humans of the kingdom of Azeroth, and the invading orcs of the Horde. The game is now out of print and the demo that was available on Blizzard Entertainment's Warcraft: Orcs & Humans homepage was removed after the site was updated. There was a CD re-release, namely version 1.21 (CD version), that didn't have the word-from-the-user-manual copy protection of prior versions