55,555 Gamerscore!

I realized yesterday that I had 55,542 Gamerscore points so I needed just 13 more to hit hit an even 55,555. I can’t remember the last time I had a Gamerscore ending a “5” or “0”. However, after a little discussion on Twitter I had a couple people point out that The Orange Box has a 13 point achievement. Since I have The Orange Box, and I never got around to getting all 99 of the achievements for it, I checked and I did not have the Vorticough achievement that is worth 13 points.