For one, my Internet connection is horrendously slow, so downloading 34 games was not an option – I gave up after having it sit there, downloading content for more than 48 hours and quite often failing.
A possible other reason: The DLC you paid for is no longer available.
As of April 2010, original Xbox games no longer can be played online via the Xbox Live service, as it was ended for the original Xbox console. E., Curse: The Eye of Isis, Dance Dance Revolution Ultramix 4, 2002 FIFA World Cup, NBA Live 2003, Rugby 2005, and Star Wars: The Clone Wars.
However, online multiplayer still is possible through third-party LAN Tunneling programs that manipulate System Link, such as XLink Kai. 7 other games were also removed, but were then added back later: Blinx 2: Masters of Time and Space, Catwoman, Grabbed by the Ghoulies, Legends of Wrestling, Mortal Kombat: Deception, Pariah, and Sid Meier's Pirates! He-Man: Defender of Grayskull remains on the list even though the game was never released; it was cancelled by the developer before completion.
I have two XBox 360’s; an old Phat one and a new XBox 360E (looked better next to my Xbox One and was for 9 on sale at the time). On the old one however, the harddrive died, so I replaced it with a new one (cheap 500Gb from Ali Express).
Now normally you can re-download the DLC content onto the new disk, but there are reasons why you’d rather do it this way …
Check out this announcement Six games were removed from the list: Codename: Kids Next Door - Operation V. These updates can be downloaded automatically from Xbox Live, from (USA), or a disc can be mail-ordered from Microsoft "soon".
Microsoft ceased adding titles to the list in November 2007, so the list is considered final.
Additionally, the manner in which compatibility is achieved and the software errors associated with it are discussed in brief. The latest European update was in November 2007, now with a total of 476 compatible games.
The original list was composed of 213 games and was unveiled on 2005-11-11 on the Xbox website; however, some games have been subsequently removed due to bugs. The latest update for Japan was released on 2007-11-28, with 122 working games.
You will be prompted to install the update if you do not already have the latest version.
This document, titled "Xbox 360 - supported video formats," is available under the Creative Commons license.
E., Curse: The Eye of Isis, FIFA World Cup 2002, NBA Live 2003, Rugby 2005, Star Wars: The Clone Wars (works only in Europe) Seven games were removed temporarily and later added back: Blinx 2: Masters of Time and Space, Catwoman, Grabbed by the Ghoulies, Legends of Wrestling, Mortal Kombat: Deception, Pariah, and Sid Meier's Pirates! He-Man: Defender of Grayskull remains on the list despite the fact the game was never released (it had been cancelled by the developer before completion).