Forge World’s Imperial Armour Updates, produced for Games Workshop, are essential rules supplements that provide updated datasheets, points, and errata for specialized resin models . These documents, ranging from historical PDF updates to the 9th edition Compendium, ensure Forge World models are compatible with current game editions . For the current 10th edition, official rules are provided as free digital downloads from Warhammer Community . Imperial Armour Compendium Updates | PDF - Scribd