Koei is a video game company best known for its historically-based (and loosely-based) video games, especially those set in feudal China or Japan. By far the most successful of their games is the Warriors franchise (which includes Dynasty Warriors, Samurai Warriors and the crossover Warriors Orochi).

The company also distributes games from Nippon Ichi's catalog in North America and Europe. As of 2010, they have merged with Tecmo, and the resulting company is known as "Tecmo Koei Corporation".

Games created/developed by Koei:

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