Romance of the Three Kingdoms XI with Power Up Kit is a strategy game developed by Koei and released in 2006. It is the 11th installment in the Romance of the Three Kingdoms series, which is based on the classic Chinese novel "Romance of the Three Kingdoms" by Luo Guanzhong. The game is set in ancient China during the Three Kingdoms period and allows players to take on the role of a warlord, navigating the complexities of politics, diplomacy, and warfare.