http://www.neogaf.com/forum/showthread.php?t=1453708
Laplasakos wrote:It should be noted that while Playstation got Melal Saga games in the past like Metal Saga, this is the first time a Metal Max game releases for the platform. All the Metal Max games until now were released mainly for Nintendo platforms (and mobile). If you want more info abou this franchise and the difference about Metal Saga and Metal Max check the wikipedia article.
https://en.wikipedia.org/wiki/Metal_Max_(series)
Famitsu: https://www.famitsu.com/news/201710/24144559.html
Dengeki: http://dengekionline.com/elem/000/001/615/1615557/