text: Tetrachroma is Tetris meets Reversi 
  
  each color flips the adjacent block into its own color
  
  absolutely mind bending, and importantly nails the mechanical feel of Tetris 
  
  even if you don't like the gimmick it has standard Tetris, including NES and TGM recreations
  
   youtu.be/q150uW4QzMc?...