Splinter Cell
Ghost Recon
Rainbow Six
Yes, all three of these series are techically licensed from the Tom Clancy universe of books. Rainbow Six was actually a book, so you could argue that the game really is a true license...as in it is adapted content from a non video game source. (The book did come first, right?)
Ghost Recon I believe is only a video game with the Tom Clancy name on it. Splinter Cell also is only a video game with the Tom Clancy name on it...until a Splinter Cell book came out a couple years ago that was not actually written by Tom Clancy.
Anyway, is Splinter Cell an original IP or license? It's licensed by Ubisoft from Tom Clancy because it uses Clancy's name, but wasn't it created originally as a video game and wasn't it the first time the Sam Fisher character appeared? I think this game is a tough one to categorize.
One of my clients is doing a big analysis of Licensed vs Original IP and in our last meeting this question occupied us for about 30 minutes.
My Opinion:
I think it should really be an original IP and not a license, because "Splinter Cell" is a bigger draw than "Tom Clancy" to gamers, even though in the beginning of the series it may have been the reverse.
Thanks