Think of Dungeon Defenders as a four-player tower defense game combined with a third-person action title. You pick an avatar from one of four iconic classes: the Apprentice (aka Mage); the Squire (aka the Warrior); the Huntress (aka the Elven Ranger); the Monk (aka...well, the Monk). Each class has unique special abilities that they combine with specific defensive structures. The Monk, for instance, is a fighter class that can summon sphere-shaped auras that can do things like slow enemies or do damage over time. The Squire, on the other hand, summons more direct defenses, putting up walls and other direct damage defenses to stop enemies and give other classes a chance to put the hurt on, the mage has far range attacks with his staff and his defences, the huntress has far range attack but powerful traps that will kill or damage and enemy. heres the trailer to the game.
http://www.youtube.com/watch?v=Kqt2XdHxpCg please no bad comments. (there is also a demo if you want to see if the game is good or not) this is the website for the game
http://dungeondefenders.com/news