Magicka is an action-adventure video game developed by Swedish independent developer Arrowhead Game Studios. It was released via Steam for Microsoft Windows on January 25, 2011. The game was developed by eight students at Luleå University of Technology in Skellefteå, Sweden and sold over 200,000 copies in its first 17 days on sale. It had sold 1.3 million copies and 4 million DLC packs as of January 2012, making it one of the most successful games published by Paradox Interactive and was credited with a 250% rise in profits for Paradox during 2012. As of June 2014, it has sold 2.8 million copies on Steam.