Gravity well plasmid, you throw it over the door (there is always an opening) and it will destroy the circuits behind. If you don’t have the plasmid yet, you’ll have to come back to this location. The Plasmid in the player's hand. You can enter it using the Gravity Well plasmid. BioShock 2. Fire your Gravity Well Plasmid over the wall through the gap at the top to unlock the door and head inside. Turn right, then right again and destroy Vacuum Bot 5/10 in this small store room. ". You will get the quest to find gravity well in this level. The slug is at the back of the area, next to a turret. For BioShock 2: Minerva's Den on the Xbox 360, a GameFAQs message board topic titled "where is gravity well. “The Thinker knows what you're going to do with that, and it isn't happy.