[MrJinxy]

Found this:

The latest issue of CVG Presents is all about Call of Duty and our print brother has scooped a bunch of new details related to World at War's multiplayer.

One of the best parts of CoD 4's multiplayer is the perks system, and the sequel will feature new perks for you to earn. The Flak Jacket absorbs the damage taken from a single grenade, the Gas Mask perk makes you resistant to gas grenades, and the Shades perk negates the effects of flares. The game will also have new perks related to the vehicles newly added to the multiplayer mode.

The magazine also confirms that co-op gameplay will be given a competitive spin with a points-scoring system for kills, and 'Death Cards' in the co-op mode unlocks more modes and features in the game.

It will support 18 players, just like the previous game, and will pack new grenades including, Gas bombs, signal flares, bouncing betties and sticky grenades.

Source:http://www.computerandvideogames.com/article.php?id=198113