I didnt sign up for xbox live until a couple years after I got my 360, so I already had about 20,000 gamerscore by the time I did get live. After signing up for live I noticed my scored had immedietly been reduced by over 4000 points!
I noticed my points for several games had been lost, although the icons for the achievements were still unlocked. It seems to have affected mostly first gen 360 titles.
the games that were affected were:
Perfect Dark Zero
Gears Of War
Tomb Raider Legend
I called xbox support and they told me there was nothing they could do. Over 4000 points, and many hours of gaming, lost forever!
Has anyone else been affected by this glitch? I cant be the only one.
update: after recovering my gamertag all evidence of my lost achievements were removed. i really dont wanna play any of these games again, so fuck it.
you fucked me out of my points ms.
update 2: I played Perfect Dark the other day and after playing one deathmatch it gave me most of my achievments back. I would like to see if this works for the rest of the games.