Only one, PGR 3. Here's a recreation of that moment.
*Is just trying his brand-new Xbox 360*
"Gee, I wonder what it looks like standing up."
*turns console up, with the disk still inside*
BZZZZZZZZZZZZZZZZT
"Oh, damn, thank goodness that's stopped. I'd better lay it down again..."
BZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZz
"Oh, fuck, fuck, it's not stopping!"
*takes disk out*
*notices it's all scratched*
"NOOOOOOOOOOOOOOOOOOOOOO!!!"
I've had 3 different consoles and that was the only time I had a disk scratched.
Jack Bz said:
It mostly ruined Sonic Unleashed. It started making weird noises during one of the bosses, froze, and since then about 40% of all stages just don't load. I haven't really touched my 360 for almost 2 years since that, actually.
If the general opinion of Sonic Unleashed is true, it looks like your Xbox did you a favour.