Modular sci-fi hive city buildings. Two interlocking families share one footprint. Room modules are the walls (archway doorways, open walls, corner pieces, and ruined variants) and stack to any height. Roof decks are the floors and rooftops (solid, doorway, corner, and ruined) and cap each level. Stack rooms, cap with a deck, and repeat into hab units, blocks, and multi-story towers.Three ways to buy: single pieces (any of the 14 room types or 9 roof decks), a ready-built kit, or the full set. Hab Unit: 1 room + 1 roof deck Hab Block: 3 rooms + 3 roof decks Hab Tower: a stepped multi-story complex of 7 rooms + 4 roof decks Full Set: one of all 23 pieces; builds three to five buildings or one large hive block Used as proxy terrain for sci-fi wargaming, compatible with Warhammer 40,000, Kill Team, and Necromunda.