Microsoft today unveiled MyAchievement, a new system that will be integrated into Xbox Live.

With MyAchievement, players Achievement Score will now unlock tiers of rewards for gamers.  Players with a score between 3,000 and 9,999 are in the Contender tier and will be able to receive a special gift during their birthday month.  Players with scores between 10,000 and 24,999 will be in the Champion tier and unlock a special gift as well as a 1% rebate on Xbox Live Marketplace purchases every month.  The Legend tier will net you a 2% rebate as well as the gift.

Be sure to head over to Xbox's site for more information.