Disclaimer: Please note that, despite everything I say in this review, I still gave it a 4* rating. You'll understand why.
This game is... weird.
It has a lot of elements that I dislike in a game. Mostly coming from technical issues, like some transitions being a bit off and/or disconnected, some moral dilemmas being too easily solved (thus being to shallow to be presented as "moral dilemmas"), in some scenes where I feel I should get an option towards the MC's action, I can't; and the "gone good" path didn't feel really rewarding to me.
I understand that, due to how many paths you can take, the first problem is forgivable, but the others, not. At least not to me.
"You're playing a corruption game, why would you want a 'gone good' path?" - Well, if the options are presented to me, why not try both? but at least, make both equally rewarding.
So, why did I give it a 4* rating? The short answer is that, although a 4* not NEARLY represents what this game is, due to its flaws, 3* rating is way too low as well.
And why do I think this game deserves a high rating despite my enjoyment being about a 2* - 3*?
First of all, the freedom you have to decide which way to go (yes, I made clear before that I felt like some actions inside a scene felt locked, determining the way the MC acted without my input. In most VN's I don't really think as a problem, but in a game with such freedom as GGGB, this should be a given). But that doesn't take away the beauty and complexity the path mechanism is in this game, it feels HUGE and complete and you feel, every moment, that your choices really matter, not only to view an extra scene, but to shape the entire story.
That is freaking awesome.
The characters. They all feel unique. Yes, the way that everyone seems instantly attracted to the MC bothers me a little, but despite that, every single one you met feels unique and have their own agendas (well, besides wanting to get laid with the MC at some point. To her, it is all too easy) But they are really, really enjoyable and you get to like pretty much everyone (not in the sense of liking every character - not you, Eric. You're poorly developed -, but even if you get to dislike someone, it feels intended)
The art style. Yea, some people may regard this as the weak point of GGGB, but I think it was really unique. At first I thought it was plain BAD, at it was hard for me to get into the game and give it a try, but the more I played, the more I enjoyed the art style and its simplicity.
In the end, do I think it's worth to take a time to play it? Absolutely.
This game seems to me one of the absolute best games of that niche (not only corruption, but on games you have that much freedom of choices and shaping your path)
Does this game have flaws? Yes, many. Did I really enjoy playing it? Not so much. But don't take my enjoyment into consideration. I've enjoyed games WAY worse than GGGB.
This game is a gem and should be treated as such. Give it a try, you'll most likely not regret.
PS: It bothers me that the 4* rating equates to "Good", by the way. I think this game is truly excellent, but when I don't have anything above excellent to give to what I would call a masterpiece of a game, I also can't give excellent to GGGB.