The release should boost CD sales in an era when songs are often downloaded online and fans can choose their favorite tracks. But the Beatles appear set to move into the digital age -- with some of their music likely to be made available as downloadable content for the video game.

"I'm probably not going to buy the album. I'll probably download it because it's free," said Robert Gold, 21, who works at a clothing store in central London.

Fans of arguably the world's most successful pop band, with album sales of more than 600 million worldwide, have waited for years to be able to download the Beatles' coveted body of work, but have been frustrated partly by a trademark dispute.

The game, which offers 45 songs from the band's catalog, has won rave reviews from critics.

Gennaro Castaldo of HMV said the significance of the Beatles release was the introduction of a new generation of fans worldwide to the group's music.

"Music-based franchises such as Rock Band and Guitar Hero now sell in the tens of millions and have huge family appeal," said Castaldo, "which is why the release of Beatles Rock Band, combined with the simultaneous release of the remastered Beatles albums, promises to be such a global event."

With video game sales falling in the United States, the makers of the game hope to appeal to older consumers whose love of the music may draw them into gaming.

However, Jeff Howells, a 36-year-old civil servant, said he was at the launch to get the discs.

"I'm not interested in the game; quite a few people are not, I suspect. I think most people will be interested in the music. The game is just a nice little fad -- I don't think it will last."