Force Field Generator

Sphere Shields are electrical devices found in Mothership Zeta and are used by aliens (one can be seen in waste disposal).

A deployable electromagnetic shield that protects against ballistic and energy weapon fire, and which also inhibit the movement of personnel (player and aliens alike). Aliens will use the device intelligently, firing at the player, then moving behind the shield to reload before re-engaging. It can be deactivated by destroying the projection unit behind the shield.The force field can also be deactivated by weapon fire, though it explodes afterward.