If you're looking for a direct comparison to other games on the market, D&D Online probably would come up as a mix between Guild Wars and Diablo styles of play. There are certainly a lot of differences as well, but D&D Online brings a lot of the same instanced team-based gameplay that Guild Wars is famous for along with a combat style that is akin to the Diablo one click is one sword stroke kind of action. The result is actually pretty exciting. As D&D Online enters into its beta testing period, things are looking fairly tight already as we found out yesterday while playing the game at an event in San Francisco.