Asriel on 15 January 2016
Did Star Fox Zero even have a confirmed European release date beyond "2016"? Or was it just 'April' 2016?
In the absence of a specific date, European retailers could just be guessing. A UK based site (base.com) currently have Star Fox Zero pegged for June 24th, while gamecollection (another UK site) have 22nd April down.
