The castle is under siege and you are one of the few heroes left that can defend it from this grave threat! Mount the city walls and prepare to face down hordes of monsters in Bastion, a new cooperative game of tower defense for one to four players. By channeling the sources of mana within the city`s districts, defense towers, and citadel, players work together to defend its borders, all the while gaining useful spells from the enemies they defeat - from lowly warriors to the legendary Valkyrie! But, manage your resources wisely, for only through careful planning and teamwork will you be able to stem the tide and save the city!