As the name implies,region lock is when things are "locked out" of a country. It may be just one country or maybe multiple.  Many games are known for staying in Japan.  

List of Region Free Consoles/HandheldsEdit

  • GameBoy 
  • GameBoy Color
  • GameBoy Advance
  • Nintendo DS
  • Sega Game Gear
  • PSP(With the exception of UMD Movies)