Soundwave on 21 December 2016
I really wonder if Square-Enix switching to Unreal Engine 4 had something to do with the Switch in that it would make it easier for them work with that way.
Because Luminous Engine is something they spent a ton of money and time on, and now that it's a finished/working engine it just seems odd to dump it.
But something like DQXI likely would be much harder to port to Switch if it was using Luminous Engine instead of UE4.
