The RPG/shooter E.Y.E.: Divine Cybermancy might be best summed up as “What if Deus Ex had an even worse interface, full co-op, a metaphysics-punk setting, and required twitch skillz?” It’s vast and weird and often inscrutable. The fact that it’s made in France might have something to do with it. There’s nothing quite like it.
It’s also nearly two years old and now getting DLC. Blood Games adds four new single-player/co-op areas and a capture-the-flag mode that, uh, looks a bit overwhelming. So basically you respawn a lot? Since the scoring is based on each team having a limited pool of resurrectors, that makes sense. You can apparently hack away some of the other team’s resurrectors. More capture-the-flag games need hacking. If only there were terminals on the bottom floor of the Facing Worlds towers! More info here.
Also, Blood Games is free.