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Developed by Koei
49 games
Koei — company
- Aoki Ōkami to Shiroki MejikaReleased: 1985Series: Aoki Ōkami to Shiroki Mejika
- Romance of the Three KingdomsReleased: 1986Series: Romance of the Three Kingdoms
- Genghis KhanReleased: 1987Series: Aoki Ōkami to Shiroki Mejika
- Nobunaga's Ambition IIReleased: 1988Developer: Koei
- Romance of the Three Kingdoms IIReleased: November 2, 1990Series: Romance of the Three Kingdoms
- Uncharted WatersReleased: April 5, 1991Series: Uncharted Waters
- Taiko RisshidenReleased: 1992Developer: Koei
- Genghis Khan II: Clan of the Gray WolfReleased: July 30, 1992Series: Aoki Ōkami to Shiroki Mejika
- Romance of the Three Kingdoms III: Dragon of DestinyReleased: November 8, 1992Series: Romance of the Three Kingdoms
- Inindo: Way of the NinjaReleased: November 27, 1992Series: Nobunaga's Ambition
- Winning PostReleased: 1993Series: Winning Post
- Uncharted Waters II: New HorizonsReleased: February 25, 1994Series: Uncharted Waters
- Romance of the Three Kingdoms IV: Wall of FireReleased: December 9, 1994Series: Romance of the Three Kingdoms
- Sangokushi KoumeidenReleased: 1996Developer: Koei
- Sangokushi SousoudenReleased: December 11, 1998Developer: Koei
- Angelique TroisReleased: 2000Series: Angelique
- Romance of the Three Kingdoms VIIReleased: February 18, 2000Series: Romance of the Three Kingdoms
- Romance of the Three Kingdoms VI: Awakening of the DragonReleased: March 31, 2000Series: Romance of the Three Kingdoms
- Romance of the Three Kingdoms VIIIReleased: June 29, 2001Series: Romance of the Three Kingdoms
- Romance of the Three Kingdoms VReleased: September 26, 2001Series: Romance of the Three Kingdoms
- Sangokushi BattlefieldReleased: September 10, 2002Series: Romance of the Three Kingdoms
- Romance of the Three Kingdoms IXReleased: May 14, 2003Series: Romance of the Three Kingdoms
- Romance of the Three Kingdoms XReleased: July 2, 2004Series: Romance of the Three Kingdoms
- La Corda d'OroReleased: November 10, 2005Series: Kin’iro no Corda
- Naval Ops: Warship Gunner 2Released: February 23, 2006Developer: Koei
- Romance of the Three Kingdoms XIReleased: March 17, 2006Series: Romance of the Three Kingdoms
- Samurai Warriors 2Released: November 16, 2006Developer: Koei Tecmo Holdings, Koei
- Uncharted Waters OnlineReleased: January 7, 2007Series: Uncharted Waters
- Dynasty Warriors: GundamReleased: March 1, 2007Series: Dynasty Warriors
- Warriors OrochiReleased: March 21, 2007Series: Dynasty Warriors
- Winning Post 7 Maximum 2007Released: March 29, 2007Series: Winning Post
- Dynasty Warriors DS: Fighter's BattleReleased: April 5, 2007Series: Dynasty Warriors
- G1 Jockey 4 2007Released: November 1, 2007Series: G1 Jockey
- Sangokushi OnlineReleased: February 29, 2008Series: Romance of the Three Kingdoms
- Winning Post 7 Maximum 2008Released: March 13, 2008Series: Winning Post
- Warriors Orochi 2Released: April 3, 2008Series: Dynasty Warriors
- Dynasty Warriors: Gundam 2Released: December 18, 2008Series: Dynasty Warriors
- Monster RacersReleased: January 22, 2009Developer: Koei
- La Corda d'Oro 2Released: February 26, 2009Series: Kin’iro no Corda
- Musou Orochi ZReleased: March 12, 2009Series: Dynasty Warriors
- Dynasty Warriors: Gundam 3Released: December 16, 2010Series: Dynasty Warriors
- Fist of the North Star: Ken's Rage 2Released: December 20, 2012Series: Dynasty Warriors
- Romance of the Three Kingdoms XIIIReleased: January 27, 2016Series: Romance of the Three Kingdoms
- Romance of the Three Kingdoms XIVReleased: January 16, 2020Series: Romance of the Three Kingdoms
- Genghis Khan: Aoki Ookami to Shiroki Mejika IVSeries: Aoki Ōkami to Shiroki MejikaDeveloper: Koei
- KessenSeries: KessenDeveloper: Koei
- Kessen IISeries: KessenDeveloper: Koei
- P.T.O.Series: P.T.O.Developer: Koei
- P.T.O. IISeries: P.T.O.Developer: Koei