Shown here in its "Starry Night" television commercial version, the Shield Bubble, also sometimes erroneously called the Bubble Grenade or Shield Grenade, is a piece of equipment that can be "deployed" using the X button to form an energy barrier that protect the player temporarily from weapons fire and explosions, but not from vehicle collisions. Other players may also penetrate the barrier.

Word is that these items will be rare on the map, so don't expect to see many of them being used at once.

In alpha footage, the device was large, somewhat round, and rolled when deployed on an incline. Later footage showed it somewhat more similar to this device in appearance, and remained fixed in place when deployed. Word has it this is the incarnation that will appear in the Public Beta on May 16, 2007.