It seems the unique AR RPG for Nintendo 3DS will be seeing a free-to-play instalment, as development company, Genius Sonority, have recently announced Denpa no Ningen RPG FREE! This version will be completely free to download, though it will use micro transactions to obtain certain items. It is scheduled to be released in Japan on the 23rd July; there is currently no word on a western release yet, but I would expect them to announce it soon seeing as the previous three games have all released in North America and Europe.
This isn’t the first free-to-play game. Back in February, Nintendo released their first free-to-play on Nintendo 3DS based off the launch title Sub Diver. Here’s the announcement trailer for Denpa no Ningen RPG FREE, enjoy!