Re: Games you've got all the achievements for?
 

The games I have completed are
Elder Scrolls IV Oblivion
Assassin's Creed
Assassin's Creed II
Fable 2 Pub Games
Star Wars the Force Unleashed (1000/1250, stupid addons i refuse to buy)
and I just have the treasure hunter achievement left for Final Fantasy XIII.
I also only have the final bottlecap achievement left for Fallout 3 but I'd have to start completely over to get it. :(

And yea FF13 takes forever, sitting at almost 90hours of game time and just have to farm up Dark Matter and money to get my last achievement. Which will still take many more hours.

Re: Games you've got all the achievements for?
 

Tomb Raider Legend, Anniversary and Underworld are easy as pie to get 100% on, and they are really generous with their points, they'll seriously give you 75g just for beating one of their easy-♫♫♫ 15 minute long levels.

Other than that I've never gotten all of the achievements on another game, I almost reached it in Mass Effect though.