Nobunaga no Yabou: Reppuuden | December 16, 1999

Nobunaga no Yabou: Reppuuden is a historical simulation game released in 1999 by Koei (currently Koei Tecmo Games). It is the eighth installment of the Nobunaga no Yabou series. After the release of the Windows version, it was ported to various home gaming consoles, and budget versions like the Koei Standard Series were also released. A twin campaign edition with Nobunaga no Yabou: Bushou Fuunroku was released for the Windows version on September 29, 2005. Additionally, a smartphone version was released in 2019. The Windows version is officially guaranteed to work on Windows XP and Windows 7, but there has been no official statement regarding its compatibility with Windows Vista.

The game adopts a sandbox-style internal management system similar to the previous installment, Shouseiroku. In the battlefield combat, the scale of the battle changes depending on the size of the armies, and with the introduction of battle formations, units can be moved more dynamically. New elements, such as a "prestige" system representing a daimyo's influence, were also added.

The music, composed by Kousuke Yamashita, was performed using synthesizers, unlike the orchestral recording of the previous installment. Hideki Matsutake participated in the recording. During internal management, music specific to the region of the daimyo's castle is played, just like in the previous installment. However, during war, there are three tracks for each type of battle (field battle and siege), and for specific clans such as Oda, Takeda, Uesugi, Mori, and Shimazu, there are exclusive battle music tracks.

Graphically, the game saw an increase in resolution, which allowed for more detailed facial images of the generals. This was the first installment in the series to feature original facial images for all generals, rather than simple montage-based ones. These facial images and design elements would continue to evolve in the following installments, including Soutenroku.

For the first time in the series, a time-out condition was introduced, where if the victory condition is not met by 1700, the game ends in failure.

The game uses parameters for generals, which include "politics," "combat," "command," "intelligence," "compatibility," "lifespan," and "loyalty." The "command" parameter is described as a form of defense, but more accurately, it refers to the defense against retaliation or ranged attacks (such as cavalry charges, archery, or firearms). When a daimyo dies or retires, if a relatively low-ranking general takes over, even if they have a strong bond with other generals, those with higher accomplishments might break away, leading to potential division in the clan. This can sometimes be caused by female generals.