Amata (アマタ)

Amata (アマタ) is the developer of the Yume Nikki fangames Farewell, Negaigoto and Overdrive. They stated on their (now deleted) Twitter that they'll be stopping distribution of their games at the end of 2019, making their fangames inaccessible.

After that, they deleted all of their known social media accounts for unknown reasons.