Insomniac Games' North Carolina studio director Chad Dezern walks us through nine minutes of gameplay footage from the upcoming four-player co-op Ratchet & Clank: All 4 One, showing us creative ways to hurt our friends.

We can pretend that Ratchet & Clank: All 4 One, introduced at GamesCom last month, is all about cooperation. It certainly features many devices and obstacles meant to be utilized or overcome with the help of friends. I just spent the entire length of that video noting interesting ways I could kill my fellow players. I could fire them off platforms, purposefully throw the air vent game, stop firing my weapons at inopportune times; the possibilities are endless!

Ratchet & Clank: All 4 One First PS3 Gameplay Video [PlayStation Blog]