Actually there are 4 versions at least.
Killer Queen - the original, made by a doujin group before they formed a company
Secret Game: Killer Queen - a remake of Killer Queen, made by Regista (the same company who did I/O and Root Double.) I don't know how much Nakazawa was actually involved in it.
Secret Game: 2nd Stange - the next game in the series, was too rushed and thus pretty much unfinished.
Rebellions: Secret Game - a remake of Secret Game: 2nd Stage, expands on the story by basically adding and rewriting about 80% of the original (they added a few more routes too). Was written by the Root Double team.
Yeah it has a similar premise as the Zero Escape series. Are these games any good? Maybe, who knows, lol.