Well for me it would be: I, II, IV, VI, VII, VIII, X, X-2, and XII. Also FFTA and Dirge of Cerberus if we're counting spinoffs. (Not that I really want to play DoC again, but...)

Anything else I've either not played or no longer own for some reason (I lose a LOT of vidya; it's depressing.) Depending on how hardcore I'm feeling I might try to track down some of the missing ones before I start.

I don't think I could do it in two weeks like you, HC, between holding down a job, getting in my daily strategy game fix, and other assorted things.

(SPOILER)*coughs* actually I'm unemployed at the moment but PRESUMABLY I'll have something within a week or so... hopefully...