Not all Xbox 360 Achievements or PlayStation 3 Trophies have unique names. Many, in fact, have the same name. Gaming site Giant Bomb figured out the most common ones.
The Giant Bomb guys put one of their engineers on the case, having him trawl through data collected by their website. The site tracks Achievements, Trophies and similar accolades that are available through the Xbox 360, PlayStation 3 and the PC's Steam service.