The Archon Studio Rampart Vertical Expansion is a modular terrain set for tabletop gaming that adds multi-level structures, such as floors, bridges, and ramps, to a battlefield. It is designed to be compatible with previous Rampart sets and can be assembled with pegs or optional magnets. The expansion includes functional pieces like ladders, stairs, and a vehicle ramp, along with numerous floor pieces and trim, allowing for more dynamic and strategic gameplay, often within a post-apocalyptic "City Ruins" theme.