Dont the reg details just consist of the number in the back of the manual and a password? I have several retail games that i could not exchange because of the same thing, was on PC though. Here is an article based on the OMG SONY KILLING 2nd HAND GAMES MARKET! Read the update at the bottom as that is the important bit,
and from gamespot
http://uk.gamespot.com/pages/news/show_blog_entry.php?topic_id=23921409&page=5
It is more likely done that way not to stop you selling on the game but more to do how PSN works, maybe something to do with how the P2P needs to be set up or something as it is not the same system as Xbox live. If it was to do with locking out to one console to increase revenue and game sales, it would be done for all versions of the game would it not?
At the start of the year Sony filed a patent that could threaten the second hand games market and independent retailers alike.
The patent would allow Sony to lock a game to the first console that it was played on, meaning that if you sold the game or lent it to a friend they would be unable to play it on their console.
Sony stated at the time that the aim is to protect itself from counterfeit software, but were aware that the same technology would also prevent the re-sale of used games.
At the time many people shrugged it off not really thinking Sony would go through with the idea as it would kill the second hand games market, the games rental market and seriously hurt independent retailers. All of which could damage PS3 console and games sales.
However retail sources have revealed to GamesRadar that "high street games shops have been told by Sony that there will be no PS3 pre-owned sections in their stores as it will be illegal for customers to sell any next-gen PlayStation games that they've bought"
It seems that Sony intend to do this by adopting a licensing scheme which means that gamers won't actually own their games, instead they will merely be purchasing a licence to play them.
Will Sony use their patent? Will Sony make it illegal to re-sell PS3 games?
At the moment no-one really knows, but lets hope not.
Sony have yet to comment on the rumours that they will make it illegal to re-sell PS3 games.
------------------------- Upddate 25/05/06 -------------------------------------------
Late 2005 Sony debunked the first round of rumours about locking games to a console by saying "this is false speculation and that PlayStation 3 software will not be copy protected to a single machine but will be playable on any PlayStation 3 console."
We posted this news story due to re-speculation of the patent and rumours of Sony licensing games.
We have contacted Sony regarding both rumours / speculation, and it seems (as most thought) that they are both 100% false, we are just waiting for 100%. concrete confirmation from Sony Europe.
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and from gamespot
http://uk.gamespot.com/pages/news/show_blog_entry.php?topic_id=23921409&page=5
It is more likely done that way not to stop you selling on the game but more to do how PSN works, maybe something to do with how the P2P needs to be set up or something as it is not the same system as Xbox live. If it was to do with locking out to one console to increase revenue and game sales, it would be done for all versions of the game would it not?