The Eiketsuden series is a group of titles that are spinoffs of Koei's Romance of the Three Kingdoms series. Gameplay is similar, but while the original series strives for a more historic base and neutral retelling, the Eiketsuden games are designed to be narratives centered around specific personae. The protagonists are elevated as heroes, while their adversaries are demonized by the story sequences.
Gameplay features tactical turn-based strategy combat. There are a large range of officers that can be deployed in the different stages, and each officer has a unique combination of attributes, strengths, and weaknesses.
Although the series was started as a narrative based on The Romance of the Three Kingdoms, there are a couple titles that delved into Sengoku Japan, featuring prominent characters from that time period instead.