Take a Very First Look at TERA M, the Prequel of TERA
Netmarble announced to show the actual game on September 8's media showcase event. Besides, it's confirmed that the mobile version will be using Unity Engine and released before the end of 2017, likely in South Korea first.
Apparently the name TERA M tells this is a mobile game and it was first announced back in January, at Netmarble Together with Press event. Today the developer Netmarble Games opened the Korean teaser page for the mobile MMORPG based on TERA IP, introducing the game's back story and the world.
TERA M sets 1000 years before TERA's era and as a prequel the mobile version features similar graphics style with the PC version. There' s no actual gameplay at this moment except for a teaser trailer.