Is there a series in which you have played - and beaten - every game? And because I know game companies love spinoffs let's settle for main series games here. In addition MMOs can't really be traditionally "beaten" so if you've beaten every FF except the MMOs I'd say that counts.
This is a tough question for me to answer because there are plenty of series where I have played every game but not BEATEN every game. Example - The Elder Scrolls. I'm a dirty casual and haven't beaten Arena and Daggerfall. I have played them both a lot at least.
I have beaten every Dragon Age game though! Whoo!
I would be able to say Deus Ex but I couldn't get the second one working on my PC.
What is your guys score for game series?