Block Mesa 64
This hack will NOT work on Project 64. You must use Mupen64 or Parallel launcher. This hack is also console compatible, with excellent performance throughout.
Mario heads to work one day, expecting regular gaming shenanigans, but suddenly unusual circumstances arise from a cursed Xbox 360.
You must fight, move and survive your way through the changed Block Mesa complex, and find a way to stop the invasion of outer world beings.