Variant Editor – for editing the look of characters, units and ships.The Assembly Kit is essentially a collection of tools and example data files that will help modders create bigger and better mods. If you have any questions or find any bugs to report, please visit the official forums here: The Assembly Kit is currently in Beta, and its feature-set will expand over time. Following the successful launch of the Steam Workshop for ROME II, we are pleased to release version one of the Assembly Kit for ROME II.