The keyword is crucial. Old PKG versions of Mario Kart 64 from the early 2010s often had serious issues: missing textures, broken battle mode, or 2-player split-screen lag. A new PKG, typically compiled within the last 2-3 years, leverages updated versions of emulation cores (often based on stable builds of Wii64 or Mupen64Plus). Current releases feature:
Or simpler:
to the PS3, developers have explored porting other N64 titles. While Super Mario 64 mario kart 64 pkg ps3 new