Okehazama

Okehazama 1st appeared in Samurai Warriors.

Samurai Warriors
In the 1st Samurai Warriors the stage serves as the downfall of Yoshimoto. It is a three-way battle including the Imagawa, Oda, and Tokugawa. Both latter clans fight for independence, and the player, if using Hanzō, may use the ninja path leading into the Imagawa main camp. Though the battle is shown via cutscene in second game, it is not playable. It does, however, return in the Xtreme Legends expansion, and serves as a stage for Yoshimoto, Katsuie, and Toshiie. In the Oda scenario, Hideyoshi leaves the field to find a path to ambush the Imagawa main camp, while Nobunaga lulls Yoshimoto into a false sense of security. Eventually, Hideyoshi reappears with some few peasants, and together they ride down a slope and attack the enemy commander. Unlike the previous version of the battle, the Tokugawa faithfully serve the Imagawa.

Devil Kings
In the game Okehazama is a playable stage. In this stage you face Yoshimoto Imagawa.

Onimusha
This battles is mentioned in the 1st and 2nd game as the 1st "downfall". Unlike historical simulations Nobunaga dies because of being outnumbered by the Imagawa. Later years after the battle Nobunaga rises from the dead by the demon clan.

Battle
Nobunaga left a small force at the temple with a large number of banners, to give the impression that this was the location of his main force. Meanwhile, Oda's main force (about 1,500 men) moved through the forest undetected to the rear of the Imagawa army.

The Imagawa samurai did not expect an attack, and that afternoon was very hot. The histories say that the Imagawa were celebrating their recent victories with song, dance, and sake. An afternoon rainstorm further aided Oda's soldiers who arrived at the Imagawa camp just as the rains came down (this was the afternoon of 12 June).

When the storm passed, Nobunaga's men poured into the camp from the north, and the Imagawa warriors lost all discipline and fled from the attackers. This left their commander's tent undefended, and the Oda warriors closed in rapidly. Imagawa Yoshimoto, unaware of what had transpired, heard the noise and emerged from his tent shouting at his men to quit their drunken revelry and return to their posts. By the time he realized, moments later, that the samurai before him were not his own, it was far too late. He deflected one samurai's spear thrust, but was beheaded by another.

Aftermath
With their leader dead, and all but two of the senior officers killed, the remaining Imagawa officers joined Oda's army. Soon the Imagawa faction was no more and Oda Nobunaga was famous as his victory was hailed by many in Japan as miraculous. The most important of the samurai lords who joined Oda after this battle was Tokugawa Ieyasu from Mikawa Province. Tokugawa would remain a loyal ally of Oda from this time till Nobunaga's death.