Players use emulators like Cemu (for Splatoon 1) or yuzu/Ryujinx (for Splatoon 2 & 3). [4, 6]
No. Nintendo has never released Splatoon (1, 2, or 3) for Windows or any PC platform. It is a strict Nintendo Switch/Wii U exclusive. [1, 3] Players use emulators like Cemu (for Splatoon 1)
None. Cons: High risk of infecting your computer; the game won't actually work. Players use emulators like Cemu (for Splatoon 1)
This requires a powerful PC and "dumping" the game files from a console you legally own. It is not as simple as a "one-click" free download. [7] Players use emulators like Cemu (for Splatoon 1)