Today 3DS owners who fans of the anime series Attack on Titan can pick up the official game in the US for $39.99. However, the downside to that is due to a copyright claim in Europe, the EU version will henceforth be known as Shingeki no Kyojin: Humanity in Chains, and is currently delayed. While there is still no exact launch date, ATLUS plans on issuing an update soon.
For those who purchases Attack on Titan: Humanity in Chains or Shingeki no Kyojin: Humanity in Chains will receive a unique Attack on Titan theme for Nintendo 3DS for free. This theme will not be available for purchase separately, it’s only available by purchasing the game. (But as you correctly inferred, this means both the Americas and Europe will receive the theme)
Be sure to check out the new character trailer for the characters you can play as in Attack on Titan! From the greenhorns like Eren Jager and Armin Arlet to the experienced Levi, the captain of the Scout Regiment, players will be able to step into the shoes of their favorite character and relive the plot of the anime.