I'm intrigued Is it about romance like each dude has a "route"? I don't really like that but if there is a good story why not...
What do you mean by crossover btw?
It's sort of what the press termed it. With a far greater emphasis on (frankly, awesome) story and a strong-willed heroine with real agency, it's a bit different from a lot of otome games.
Yep, each guy has a route. It's a solid enough game and can be played as a mystery story irrespective of the otome stuff, but I'd still say you have to have a tolerance for some romance. It's certainly not as thrilling as something like Steins;Gate either.
My review here:
https://kresnik258gaming.wordpress.com/2017/03/22/vita-code-realize-guardians-of-rebirth-review/
Oh yeah, by no means an S;G, but definitely the otome game for those who have yet to click with the genre! Quality review, by the by.