Namco Bandai opened the official website of the next Tokyo Ghoul smartphone RPG game the Tokyo Ghoul:re invoke. The game will be available from 2017 Spring in Japan on iOS and Android as a free to play title based on the Tokyo Ghoul TV animation.
If the pre-registered users number breaks through the 12 800 you will get an extra characters Naki from the original story with 5 red stones what you can spend on more rare characters / items.
Depends on the registered users number you will get even more gifts and characters. You can find the pre-registration link on the official website. Until more information, please stay tuned!