Developer Seed has announced that Under Siege, a new RTS for PSN, will be released April 27 in Europe and May 3 in North America.

Under Siege is an action strategy game where a small group of heroes fight against a huge invading army. The game is set in a medieval fantasy world and follows the story of Eirik, Kari and Asgeir.

In addition to support for the DualShock 3, Under Siege also fully supports PlayStation Move.

Under Siege also features an editor, allowing players to create their own maps and game modes - it's the same tool used by the dev team to build the levels shipping with the game.