Those games, Fragments and RoboRaid you mentioned, are awesome games and can stand on their own on any platform I am sure, however, when it comes to mixing games of digital type superimposed on real world (of reality type!), the "Mixed Reality" you get to experience on HoloLens 1, the gear I am using currently, is unbelievable.

Note: I avoided using the term "Augmented" for a very specific reason and a very important reason, at least in my mind.