The multiplayer in BC is set prior to the events of the single-player campaign. Gamers play as test subjects giving a revolutionary new grappling weapon a go in various combat arenas. Not only does this give some context to the BC single-player storyline, but it also allows developer GRIN to alter some of the game mechanics to fit multiplayer. See, this way they can say, "Hey, this is what the prototype was like." According to GRIN, the single-player gameplay just didn't quite fit multiplayer and has undergone some tweaks.

Expect the standard set of multiplayer modes, including Deathmatch and Capture the Flag. The difference, of course, is that you get to swing around -- something we haven't really seen in a multiplayer game before. In fact, there are going to be some cool tandem moves for those willing to experiment in team modes. If your buddy is swinging, you can attach your bionic arm to him (don't ask where) and swing off him, allowing you to get a greater arc and therefore greater loft to get to otherwise unreachable places.