If you are looking to get the expansion for "free" or at a significant discount, your best bet is to utilize official storefronts during seasonal sales:

Romance of the Three Kingdoms 13 and its expansion frequently go on sale during the Steam Summer, Winter, and Lunar New Year sales, often at discounts of 50% or more.

The social aspects of the game are greatly enhanced. You can now engage in more meaningful relationships, mentor subordinates, and experience new event scenes that bring the personal drama of the Three Kingdoms era to life. 4. The Strategy Map Overhaul

The expansion introduces a "Village" and "Geographical Advantage" system. Controlling specific areas on the map now grants unique bonuses, making the positioning of your armies and the development of your territory more strategic than ever. Why You Should Avoid Unofficial "Free Download" Sites

Add the game to your Steam or PlayStation Store wishlist to receive an immediate notification the moment the price drops. System Requirements

The expansion is more than just a simple DLC; it’s a complete overhaul of the game's core mechanics. Here are the standout features: 1. The "Prestige" System

Supporting the developers at Koei Tecmo ensures that they can continue to produce niche grand strategy titles like Romance of the Three Kingdoms and Nobunaga's Ambition . How to Get the Best Deal Legally