Artdink release on December 1, 2016 the next A-Train 3DS game in Japan the A-Train 3D: City Simulator NEO (A-Ressha de Ikou 3D Neo). The official DEMO version released today in the Japan eShop what you can download for free and you can clear the Chapter 1 and the Chapter 2 and you can move the save data file to the final version.
The game going to be based on the 2014 February released A-Train 3D: City Simulator which later released in North America and Europe too but this game is mostly popular only in Japan. The game going to supports of the normal and the New 3DS consoles and on the New 3DS the game will be faster.
It should be noted that if you have the original game (A-Train 3D: City Simulator) you can update it with the “NEO” patch the get the new contents. If you don’t have it, than the NEO going to costs 4500 Yen + tax.