Retro-Pie (link)
     Raspberry 3 (link)
     PS4 or Custom Bulit Bluetooth Controller or Buffalo iBuffalo Classic USB Gamepad
     Custome Built Light-Gun for Duck Hunt or Scratch Built Shooter for Light-Gun
     Custom wrote code to allow spit-screen 2D's games for older 4:3 Games
     Python (link)
     
 
      Just a rough idea right now.  Kind of wondering why no one has writen a game engine for the Pi?  My at the moment main goal is to be able to play NES, SNES, N64 games to start, and on the big screen in the livingroom , my main concern is the 4:3 scaling to 16:9 TV.  
     The Pi 3 can also run Quake, Minecraft Pi, Baldur’s Gate pretty smoothly, I havent played it myself as of yet.  Ill diff be looking more into a or building a game engine for the Pi.
 
Feedback is welcom, 
Knight