Kessen (決戦, "Decisive Battle") is a real-time tactics video game produced by Koei.

It is a real-time tactics game set in feudal Japan, focusing upon a conflict between the eastern Tokugawa clan and western Toyotomi clan (with Ishida Mitsunari as the Toyotomi's guardian and protector) shogunates at the end of Sengoku Jidai.

Tokugawa Ieyasu served as the primary representative for the Eastern forces where the Western army changed leaders based on the results of select key battles.

A note from the game's producer, Kou Shibusawa, addressed to players before any campaign begins, explains his desire to take his own twist on this segment of history but felt too constricted by cinema to do so properly.

noted that the game is easy to pick up, although he felt that it failed to maintain its difficulty level after the initial stages.

[15] What gained Kessen the most praise was the game's sound department, many citing the orchestral score to be "epic" with one critic noting the "English voices to be good and fitting".