Grav Shield
From Multiversal Omnipedia
The Grav Shield was a defensive shield surrounding Venus developed by Professor Algernon (as the "assistant" to Neosapien scientist Xenobius). It functioned by subjecting anything unauthorized that entered Venus' atmosphere to amplified gravity, crushing the target until it was destroyed.
The original Grav Shield was sabotaged by Algernon when he was taken by Able Squad in a commando raid. It was not repaired until the Neo Megas were developed, who possessed both the intelligence and creativity necessary to fix it. However, the cloaking abilities of the Pirate Clans' ships made it impossible for the Grav Shield to lock on, rendering it ineffective.