Set in a medieval fantasy world, Under Siege sees players control a small group of heroes -- Eirik, Kari and Asgeir -- in a battle against the huge invading army of King Ingvar. With a single-player campaign, as well as online and local multiplayer content, the game works with the DualShock/Sixaxis controller and also supports the PlayStation Move controller. Under Siege places extreme emphasis on user-generated content and in-game battles. Using the same powerful in-game editor used by the developers, players can create their own maps to share and play online with other members of the Under Siege community. The game interfaces with several social networks, for example allowing users to directly upload pictures to Facebook and videos to YouTube.