Square Enix and Obsidian Entertainment released another trailer for their upcoming RPG. The trailer reveals the character Lucas, one of four playable heroes in Dungeon Siege III. In the trailer, Lucas fights with a sword and easily slashes his way through swarms of enemies. Dungeon Siege is set for release on May 31, 2011 for the PC, Playstation 3, and Xbox 360. Watch Lucas make his debut after the jump.