ATLUS just announced the launch edition of Etrian Dungeon for the 3DS:
Available in the launch edition of Etrian Mystery Dungeon on Nintendo 3DS™, the "Sights & Sounds of Mystery" bonus is a special prize reserved only for the most impassioned of explorers. Secure your ownership of the North American-exclusive collectible outer box that contains a limited edition CD-book package. The "Rough Sketch Ver." soundtrack CD contains six "rough" versions of the musical themes found in Etrian Mystery Dungeon. The 28-page book contains art and information to aid you in cultivating the best party to help you triumph inside the mystery dungeons.
There is also a chance to win the Mystery Box (end of the trailer):
Etrian Mystery Dungeon releases April 7th 2015.