Which franchises have you bought the most games into?

[Gilgamesh]

Final Fantasy hands down, 11 games (1, 2, 4, 7, 8, 9, X, X-2, XII, Dirge of Cerberus, Crisis Core)

Then Mario (Mario Paint, Super Mario All-Star, Super Mario World 1 and 2) (Soon to be tied with MGS once I get 4)