I've checked and found out that I don't have the Achievement for "Scientific Pursuits". No idea if this was purposely done by myself (ie took on another challenge instead and now can't get back to that one). I know one thing for certain, when I come to level up to 30, I'm saving my game and then taking the Godly, Neutral and Devil perks in separate games in order to gain each Achievement. I should have done that for the others, too. Bah.
Have you done all the other quests, mate? I mean not just the main ones, but the side quests and even the
unmarked quests?
For example, on Broken Steel :
http://fallout.wikia.com/wiki/Broken_Steel
The quests at the bottom? You done that for almost every location? I'm trying to work my way around doing them all, but it's going to take so, so long. Most of them I didn't even know existed, either!