The force shield provides more protection than the acid shield in that it protects the equipped wearer against all projectiles. This effectively defends against acid rain, guns, turrets, mob weapons, and ash rain.
How to Obtain
You can trade it for it, craft it, or purchase it as part of the various packs in the store. This item also sometimes drops as loot from Chests.
Put it in one of your accessories slots. When properly equipped on iOS devices, a purple-colored shield icon will appear on screen. Click/tap on this icon and you will see a glowing field around your avatar. Click/tap on the shield icon to turn it off. On a Mac, hold the X key to activate. When the shield is activated, it will consume steam.