Goat Simulator started as a joke prototype from an internal one-month game jam held by Coffee Stain Studios in January 2014.
Lead developer Armin Ibrisagic focused on goats after convincing his coworkers that goats go viral on the Internet. Footage of the game in its alpha state was posted to YouTube received more than a million views in 2 days and fans requesting a full release of the game. It was released on 1 April 2014, April Fools’ Day, to raise doubts on the validity of the game.
Goat Simulator also releases downloadable content that adds elements of other famous games (World of Warcraft, Payday,etc.)