News Website IGN has released an article detailing the new features of the Multiplayer mode in Gears of War 2 for Xbox 360, Listing all new weapons, maps and Mulitplayer Modes.

Read the Quote for a quick preview, but the complete list is at source.

New and Modified Weapons
Scorcher Flamethrower -- This sucker will appear only once on a multiplayer map. It benefits from a longer range if you can hit the active reload perfectly and will glow red when it's ready to bring death to the masses.
Gorgon Burst Pistol -- Faster rate of fire than other pistols and shoots in short bursts.
Poison Grenade -- Spews a nasty purple haze that brings down everyone in its path.
Shield -- This sucker can be chucked into the ground beneath you and used as stationary cover. Of course, you can also carry it around and use it in conjunction with a pistol.
Lancer Assault Rifle -- You've heard this before, this armament from the original now has a tie-breaker for chainsaw kills. Mashing the B-button as fast as you can could lead to three outcomes. First, you win and slice through your opponent. Second, you lose and meet the same fate. Or third, there's an improbable tie and you both step back to go at it again (or whip out a shotgun and own their face). And no, you're not invulnerable for any part of the animation.

Onvacation via uk.xbox360.ign.com »