Holy shmaow, register 3 games in your nintendo club account and recieve a fourth for free! Only thing is it's only for europe
Quote (http://mynintendonews.com/2013/04/22/register-three-select-nintendo-3ds-games-and-get-a-fourth-game-free/)
With such a large roster of games available for Nintendo 3DS right now, players may find it difficult to decide which one to go for next. Starting from tomorrow (23rd April) Nintendo Europe will be launching the So Many Games! Promotion on a select range of top Nintendo 3DS titles to help them choose.
Players simply need to register any three of eight top Nintendo 3DS titles with Club Nintendo by 30th June 2013, and they will be able to claim a free download code of their most-wanted game from the range for FREE. They can choose one of the remaining five titles to enjoy playing on Nintendo 3DS themselves, or select one they’ve already registered for the promotion to give to a friend to either share the fun, or experience some exciting multiplayer action!
There are eight top Nintendo 3DS games eligible in this promotion:
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