So you could:

This article focuses on legitimate methods. Piracy or downloading executable files from untrusted third-party websites puts your system at risk for malware and does not work for online server-based games like Master Duel.

No Steam, no Epic, no Konami launcher. Completely standalone via the emulator. Cons: The mobile version has a slightly different UI (touch-optimized), and emulators can be resource-heavy. Also, cross-save works via Konami ID, so you keep your progress.