Gaming
Gamers keen to take part can sign up to the tournament by clicking on the notice featured on the Xbox Live Dashboard and downloading the free GamerPic.
Once registered, players will take part in three game modes that make up the tournament - Slayer, King of the Hill and Oddball.
All players can take part in open play, which runs from March 18 to 30, and after that the top ranked players from each European country will be crowned Halo 3 National Champion and will receive an exclusive piece of framed Halo artwork as a reward.
National Champions will then go on to the European Final, where top players from across the continent will battle in a one-off Xbox Live match.
Among the prizes available will be a Samsung Crystal Design 40" FHD Television and an Xbox 360 Elite console.
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