Big Shell is a fictional offshore facility featured in the video game series Metal Gear Solid. It serves as a key location in Metal Gear Solid 2: Sons of Liberty, where players navigate through various environments while uncovering a complex narrative involving terrorism and military operations. The structure is designed to resemble a large shell and is situated in the Hudson River. It houses a variety of advanced technologies and serves as a base for the Sons of Liberty, a group that plays a significant role in the game's plot. The facility's design and purpose contribute to the game's themes of control and information warfare.