Massive issue with a game like NFSU2 is all the licensed music. I just watched a video (https://www.youtube.com/watch?v=QGdLZTgMDd4&t=735s) of an EA producer working on bringing back old games, and he said it took them over a year just to get the music licenses for a 30 year old game. And that's if they can get the licenses. Famously, no one really knows who owns the game No One Lives Forever, and the supposed rights holders aren't particularly interested in digging through their pre-digital legal archives to try to find the required documents that assert those rights.