After talking to some of the game's producers and getting our hands on it, we think we're finally starting to understand feelplus and Square-Enix's Mindjack. Though the single-player game seems like your typical cover-based third-person shooter, it's set apart by a single (albeit potentially massive) feature: Friends (or strangers, if you'd prefer) can, at any time, join your game, hack into and control a member of the opposing force or a member of your squad.
In short, it's an instant action multiplayer experience that start at any moment without warning. It's a hugely compelling concept, and one we're looking forward to checking out for ourselves when the game launches in October. For now, we (and you) will have to make due with the trailer just after the break.