During 2008, a website dedicated to finding gaming achievements was created, called AchievementHunter.com. The site is run by Geoff Ramsey and a select handful of members from the Rooster Teeth community, who also make regular contributions in the form of video guides. Unlike many other achievement-dedicated websites, Achievement Hunter is highly dependent on public contributions.
Because of this, it is able to have highly indepth guides across many games, even expanding its focus from Xbox 360 games to those on PC, PS3, and even the iPhone.
FAILS 63 and I'll see what else is there for a bit because they've got a ton of great content. Maybe I'll watch the Halo Anniversary Terminal and Skulls guide again. :-)