Nintendo's pretty generous 'So Many Games! promotion is offering 3DS gamers one free game download when buying three others.

You'll need to follow some pretty simple rules to qualify for a free game, but just in case you're confused Nintendo has released a guide in video form.

Eligible games:

  • Castlevania: Lords of Shadow - Mirror of Fate
  • Monster Hunter 3 Ultimate (Nintendo 3DS version)
  • Luigi's Mansion 2
  • Fire Emblem: Awakening
  • LEGO CITY Undercover: The Chase Begins
  • Pokémon Mystery Dungeon: Gates to Infinity
  • Donkey Kong Country Returns 3D
  • Animal Crossing: New Leaf