Warriors Orochi 2 PSP - Dream Mode - Struggle at Bai Di Castle (Chaos)
This is a mock battle between Orochi and Da Ji that takes place just before WO1, after Orochi had just conquered everything. Da Ji has a lot of strategies to throw at you and actually puts up a good fight.
I also cannot stress how hilarious it is that there's a cutscene dedicated to Orochi owning Diamondback. Like, decapitating him in Shu's final stage just wasn't enough, now he has a cutscene where he removes him from the map. (Literally, the game says he disappears.) I guess him getting so much screen time in WO3 is to make up for his treatment here lol.