Take a mediocre retro platformer, add Portal physics and a four-player option and you have this monstrosity. Mari0 is a little dull on single player, but it probably has the most hilarious and chaotic multiplayer mode I have ever seen. It makes me miss game nights at a friend’s house. I really hope they add in online Multiplayer before they receive the inevitable Cease and Desist from Nintendo and/or Valve.
Video of Multiplayer gameplay: