A new video has surfaced today which shows off the Rage co-op mode in action. For the most part it looks like your average multiplayer co-op experience. Rage co-op is limited to yourself and another teammate as you battle along side a storyline which is closely related to the single player mission.
If co-op isn't your ideal multiplayer experience though, don't worry; they offer a multiplayer mode called Rage Combat Rally. Aside from the obvious goal of shooting and killing your competition, everything takes place in a vehicle in which you're racing for rally points.
Here's the video showing off Rage Co-op mode: