A modular kit for European medieval castles, inside and out: 86 pieces that snap on a 2 m grid. Curtain walls of coursed ashlar on a battered foot, in three variants that meet on every seam with the same stones, so a long wall never repeats; arrow loops, barred windows, two-light tracery windows and pointed doorways, each with its embrasure finished inside. Round towers in 45-degree octants with loops, windows and doors, a timber spiral stair and a floor on every storey. A gatehouse with a drawbridge on iron hinges, its chains running through iron guides into the wall, a portcullis in its grooves, a vaulted passage with a murder hole and the windlass in the chamber above. Parapets: crenellations with and without loops, machicolations, a corbelled bartizan, and a timber hoarding you can walk into. Slate and clay-tile gable roofs in slices, stone gables, arch-braced trusses for an open hall, slate cones on the towers. A dry moat with its revetment. Interiors: timber floors whose joists form the ceiling below, flagstone floors and roof decks, timber stairs, stone flights up to the wall-walk, a fireplace with its chimney. Furniture: trestle tables, benches, chests, barrels, torches, banners, weapon racks, an altar, a well. A furnished demo castle (four towers, a gatehouse, a four-storey keep, a great hall and a chapel inside a dry moat) and a cutaway are included.

Game edition included: the same pieces plus the doors drawn open, each with three hand-made levels of detail (305k, 104k and 44k triangles for the whole kit), convex collision hulls and occluders. The drawbridge and the portcullis work: the deck turns up on its hinge as its chains slide into the wall, the portcullis drops in its grooves, and their collision moves with them. One FBX per piece with a Unity LOD group and Unreal UCX collision; the drawbridge as a rigged mesh with its raise animation, the portcullis with its own. A Godot 4 addon builds whole castles from a seed (curtain, four towers, gatehouse, keep, hall, chapel, moat, hoarding) and merges them into a few meshes per chunk; the demo castle renders in 3 to 9 ms a frame. Everything is walkable: tested with a 1.75 m character, every storey, tower top and wall-walk can be reached, doors 2.0 m high to the springing of the arch, ramps on every stair.

439,856 faces, 99.9% quads. Shared tiling PBR textures, 14 materials.Formats: Blender, FBX, OBJ, GLB. Game edition: FBX with LODs and collision, Blender, Godot 4 project.