Under Siege is a PlayStation Network exclusive Real-time tactics title released June 2, 2011 that features a single player campaign, and also multiplayer via online and co-op. There is also a level editor which allows users to make and share maps. The game is set in a medieval fantasy world and follows the story of Eirik, Kari and Asgeir. It was designed to be played with the Dualshock3 controller or the PlayStation Move controller. The game was created and developed in Portugal.
On August 23, 2011 the game was released into the Asian market including Singapore, Thailand, Taiwan, Hong Kong, Malaysia, South Korea and Indonesia.