Sebastian runs a makeshift shop in which he sells items and supplies to prisoners in exchange for any research that they are carrying. He also supplies items to the player through Dead Drops, requesting credits in exchange for items to be left at the Submarine Dock. Sebastian does not see convicts sent by Urbanshade as his enemies, and is willing to help them in exchange for their help. The more times you exit and enter his shop, the more annoyed he gets, eventually kicking you out.