A huge dome that protects your base on the planet and which can be normally built only once. It creates a shield that covers other defenses during the battle. The shield is huge, but only 50% of it is restored each round. Bunker Level 10 allows you to build 2 domes. When destroyed, it will restore itself with a probability of 50%.

On orbital stations (satellites with diameter 100km or less) you can build an unlimited number of domes. In addition to protection in a battle, they protect satellite's structure from damage as a result of collisions or shots of a gravity gun. When causing damage to an object, the protection domes one by one will be destroyed first. Each new dome of this type will add less structure than the previous.