While the "Ultimate" version is available on modern platforms like PC, PS4, and Nintendo Switch, the version you can actually play on the is the Japan-exclusive Musou Orochi 2 Special . The Core Difference: Special vs. Ultimate
: If you have a Vita emulator like Vita3K , you can play the full Warriors Orochi 3 Ultimate
experience but lacks the "Ultimate" content (such as Gauntlet Mode and several newer characters) found on Vita, PS4, or PC. Musou Orochi 2 Special Performance & Emulation (PPSSPP)