This is a recent boardgame from Days of Wonder.
This is a cooperative game in which all the players team togethor and play against the mechanics of the game. Every player is one of the Knights of the famed round table and there are several on-going quests in which you work as a team or solo to win, such as quest for the Holy Grail, search for excalibur, quest for Lancelot Armor, fighting the Black Knight and so on. The game is really tough and everyone has difficult choices. One really fun aspect is that one of the players could be a traitor, secretly working against the rest of the players. This a really fun game, with beautiful components and boards.
Very good game, I give it a high recommendation.