You likely downloaded an NSZ (compressed NSP). Use NSZtoNSP converter (like SAK) to decompress it. Yuzu cannot read NSZ files natively without a plugin.
The gameplay revolves around fast-paced combat, where players control their chosen character, fighting against hordes of enemies. The game features a variety of attack combinations, special moves, and Musou attacks, which are powerful, screen-clearing moves that can turn the tide of battle. warriors orochi 3 ultimate nsp