Guinness World Record holder Raymond Cox, also known as "Stallion83" on Xbox Live, has hit 600,000 total Gamerscore earned from Achievements unlocked while playing Xbox 360 games -- a new milestone in his quest to reach a total of one million Gamerscore.

If you're not familiar with the concept, Xbox Live profiles track in-game accomplishments via unlockable Achievements, which add to a publicly-displayed Gamerscore total. Cox documents his journey at his blog, and notes that a recent 40-point achievement in Earth Defense Force: Insect Armageddon put him at the 600k milestone.

Considering that retail games typically only have 1,000 unlockable Achievement points, this means that Cox has played a lot of games. His public TrueAchievements profile lists over 800 titles across multiple regions and platforms, including Xbox Live Arcade releases and Windows Phone 7 apps.

Fortunately, Cox has a sense of humor about the whole thing, and celebrates his latest milestone with an amusing training montage, which I've embedded after the break. Gotta eat more raw eggs if you want to stay ahead of smrnov!