Peria Chronicles - Anime Style Sandbox developed by Thingsoft and will be published by Nexon in the future. Peria Chronicles was first announced in 2012 and we still need to wait few years until game will be out.
Peria Chronicles - First Anime Style Sandbox is Still Under Development
Because Peria disappeared from Nexon recent line-ups and Thingsoft working on mobile game called Project Nacho
Peria Chronicles - First Anime Style Sandbox
developers decide to publish game status update.

Peria Chronicles Status Update - http://worldwidegamewatchers.com/post/150067567341/peria-chronicles-status-update-i-havent-been (English translation)
TL;DR - Nothing Done. 
Official Facebook Group - https://www.facebook.com/nexon.periachronicles/
Old gameplay video -

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