well take the menu for instance, it would randomly open up for no reason, when on the menu, if you went to the options menu, well good luck getting back, half the pannels didnt even dissapear when you pressed back, buttons stopped working, when you played if your player went in stealth mode he couldn't do stealth kills but in not stealth mode he could just a lot of things like that, and on a programmers point, his code was all over, very hard to understand, i prefer keeping it split in chunks for easy readability, but that has nothing to do with quality, more preference.