It can be found here: https://store.steampowered.com/app/595750/ For some reason it is not linked to on the main Steam page, however simply adding it to your account should make Steam auto-download it and allow it to be selected in the game's DLC menu.

Can this game got discount on summer sale or next sale ? so long no discount for this game. Someone can say something about this game or this game can't got discount anymore ?

seriously? this is why they're making an open-world Dynasty Warriors but SW series are almost abandoned in the west.

Dear KOEI TECMO GAMES CO., LTD. I'm reaching out to you on behalf of nostalgic gamers who want to legally play your old muso games (DYNASTY WARRIORS 2,3,4,5,6)(SAMURAI WARRIORS 2,3) Pay attention to us and add these games to Steam store! We will be happy to buy and play this classic again!...

This and Warriors All-Stars never go on sale. I'd happily buy both of them if they went down to like $20 each.