Use GeDoSaTo or a simple texture scaler to upscale the UI and character portraits to 4K. The sprites will remain pixel-perfect, but the menus will look crisp.

This was the previous definitive PC version released in 2013. The King of Fighters XIII: Steam Edition Review for PC

This creates a confusing landscape for someone searching for a download.

If you want the Climax content on your PC, follow this path: