A couple days ago, we brought news that a browser-based game for Attack on Titan was getting ready to launch, but there are other games for the series in development. One appears to be for the 3DS (which is surprising, considering that the 3DS doesn’t have too many anime-based games compared to the PSP/PS Vita). The source comes from a supposed leak from the Bessatsu Shonen Magazine, which shows a title sequence of the game on a 3DS XL system.
As of right now, the game is being developed by Spike Chunsoft and is being set to release sometime later this year. No details such as the official title, gameplay, storyline, or regions have been announced, though the latter may be just limited to Japan (unless Atlus would like to localize the game overseas!). More information will apparently be made available in September, and an official site for the game is set to launch soon.