This Gunpla is related to the Gundam Breaker Prologue, a derivative work from the game.
It is an original machine.
It is a previous work that was posted to Builder's Note once in 2024.
The setting of "a GB2 character living in the world of GB3" that I had been thinking about since back then has been concretely realized in the Prologue.
The machine's name, "Rhadamanthus," is taken from the name of a judge of the underworld in Greek mythology.

HG Tallgeese Rhadamanthus | アルジドノ's Gunpla works