Paradox Interactive AB engages in developing and publishing strategy and management games. Its brands include Crusader Kings, Cities: Skylines, Millenia, Foundry, Stellaris, Victoria, Prison Architect, Age of Wonders, Across The Obelisk, Hearts of Iron, Europa Universalis, Vampire: The Masquerade-Bloodlines 2, Life by You, The Lamplighters League, World of Darkness, Surviving Mars, Battletech, Empire of Sin, Imperator: Rome, Steel Division: Normandy 44, Shadowrun, Magicka, and Knights of Pen and Paper. It operates through the following geographical segments: United States of America, Swede, Rest of Europe, and Rest of the World. The company was founded by Per Fredrik Wester in 1998 and is headquartered in Stockholm, Sweden.