Gamers have hit out at Nokia after learning that N-Gage titles bought for their handsets are locked to that specific device forever.

If a gamer changes or upgrades to a different Nokia handset they have to purchase the games again if they want to continue playing.

The issue was uncovered by website All About N-Gage.

"It's a bad idea for everyone... the N-Gage platform, gamers and third party publishers," the site said.

Nokia said it had made the decision to prevent piracy and to ensure its "partners receive their rightful revenues from our platform".