Series/Franchise milking the most out of people?

[COLOR="Red"]NFS has a lot of games, but I'm glad you put the years in them...

 GH Games

[COLOR="Red"]Gutiar Hero (2005)
Guitar Hero 2 (2006)
Guitar Hero Encore: Rocks the 80's (2007)
Guitar Hero 3: Legends of Rock (2007)
Guitar Hero: On Tour (2008)
Guitar Hero: Aerosmith (2008)
Guitar Hero: World Tour (2008)
Guitar Hero: On Tour: Decades (2008)
Guitar Hero: Metallica (2009)
Guitar Hero: Modern Hits (2009)
Guitar Hero: Smash Hits (2009)
Guitar Hero 5 (2009)

Coming November-ish: Guitar Hero: Van Halen (will be 2009)[/COLOR]

Side note: Am I the only one who thinks Activision's numbering system is wonky as fuck...? Guitar Hero 3 is the fourth game, there is no Guitar Hero 4, and Guitar Hero 5 is technically the 12th game, 9th on consoles.[/COLOR]

Let's not forget Band Hero and DJ Hero that are coming this year too. I'm still wondering what the hell happened to the Guitar Hero: Hendrix title that was hinted at too.

And yeah, I'm going to have to agree with sports games. My brother's avidly played the NBA Live and NBA 2K-"insert here" seroes; and his justification for buying the new games is to "new players", changed rosters, "tweaked" gameplay with new features and changed mechanics, and buffed up graphics. Horribly milked to the death, if you ask me; if that's all that needs to be done to warrant a new game.

Pokemon spin-offs are definitely milked a lot. Look at the crappy Pokemon Ranger and Mystery Dungeon spin-offs, and the HORRENDOUS Pokemon Ranch bought with WiiWare and Pokemon Dash. Oh, and who remembers "Hey You! Pikachu!"? There was also Pokemon Channel. Though there are admittedly awesome ones I can recall like Pokemon Snap.