​The year is 2032. Following the collapse of global energy markets and the devastating coastal incursions of the Western Coalition, the Pacific Rig (Designation: Fort Lyndon-7) remains the last operational deep-sea platform under the command of the United States. Moored precariously above the Marianas Trench, this industrial behemoth supplies the final drops of crude fuel necessary to keep the remaining military air fleets and defense grids online. If the Rig falls, Fort Lyndon's power grid flatlines, effectively ending organized resistance. A desperate defense force has been tasked with protecting this vital structure from relentless, multi-axis assaults, knowing that every module, pipe, and drilling arm they defend is the difference between survival and total darkness.