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Players can now trade weapons with each other or other soldiers in their battle against the lambent. This new enemy which first appeared in Gears of War 2 enters the game quickly when giant enemy crabs overtake the ship. These are a precursor to reanimated Locust troops called Drudges. When attacked, these enemies spawn tendril-like limbs that allow them to expand outward and upward, making cover a lot less safe. They'll also perform a last-ditch attack by blowing themselves up while running at the player.
The Locust still make an appearance along with new enemy classes like a grenadier and large, organic catapults. To face these larger threats, players can now suit up in a mechanized suit called a silverback. These come equipped with a rocket launcher and a heavy chain gun and can also be deployed as cover, allowing multiple team members to use the weapons.
There's also a new arcade mode that has highly visible scoring and stat tracking. Then it allows players to fiddle with variables including gravity, big-head mode, and sound effects. Arcade mode also includes an idea that appeared in Shadow Complex where players are alerted to how well their friends have done in a certain area.
As far as multiplayer, only two maps have been revealed including a ruined thrashball field and the sinking remains of Jacinto called Overpass. The multiplayer environments can alter dramatically during a match, like water flooding and receding from the ground. There's also a new multi-turret where players can affix their own weapons then hit a single trigger to fire bullets in four directions.
The article also promises a host of new executions using almost all of the weapons and more importantly, we'll finally learn the secret behind Adam Fenix and his plan to save the planet.
http://xbox360.ign.com/articles/108/1089204p1.html