The "leaks" are so fast and furious around Halo 3 these days it's hard to keep up with what's new and what's rehashed. I believe these show are new bits and pieces of Halo 3 including a map called Epitah.

The NeoGaf guys were quick to dissect it. Digital Limit points out these things to note in the videos:

* Delicious-looking water
* Grenade explosions
* New Equipment (Fake Motion-tracking-entities grenade)
* Pistol is used (dual wielded)
* Valhalla is looking rather lush
* Sexy lighting
* Amazing textures
* Spartan Laser Scope

Hit the jump for the other two.