Xundau comments on details of how weapon collision works in combat:

In our current Alpha build, your regular attack will only make a d20 attack roll against one opponent, even if your weapon collides with multiple opponents. I don't think this is something that we're going to change. If you have an opponent targeted, and your weapon collides with your target, you'll make your d20 roll against that target. If you don't have a target, or your target is out of range, you'll make a d20 roll against the closest opponent that your weapon collides with. If you swing and your weapon doesn't collide with anything at all, you won't get any d20 roll. Note that this is only with regular attacks. As some have pointed out, there are certain feats that let you attack more than one opponent in the same swing.

Original Thread: Hitting Multiple Targets with a Single Swing?

Sorry for playing the PR guy around here but, well, I kind of am... Here are just some of the areas that I think are the big differences between our game and anything out on the market. Combat: DDO features action com based on D&D Core Rules. While the dice are always rolling, just as they would in a D&D adventure, players also have the opportunity to influence combat by their own actions, responding to attacks by blocking or tumbling. The D&D rules allow for strategy based on a character's position, including flanking and using cover. Overall, our combat is more interactive and give players more control of their character than any other MMORPG currently on the market. Content: The quality of content in our game is very high. The types of puzzles and traps that we use regularly in each adventure we develop are on a level of quality usually only found in single player games. I get really excited about how intelligently our content is scripted, with problems encountered in dungeons that require a combination of character abilities and intelligent thought by the player. And although it is implicit, I want to point out the significance of the D&D Core Rules. This is the first time anyone has brought them to the MMOG genre. The rules have a lot of depth and options for customization that has been refined over the course of decades. I really think that players will be excited at the options that they have to make themselves unique from their fellow players through class/race combinations, skill and feat selection, and multiclassing options.

Original Thread: Correct me if I am wrong...but isn't DDO like GW?