Most consistently successful franchise

[K84]

MGS, with MGS3 and Peace Walker as the best.
And InFamous, finished IF2 on Hero last night, it was even more awesome than InFamous.

 

[Deverfro]

The 2 that jump to mind are Mario and Zelda. Nintendo seem to be able ro release games that aren't really that new and still have the super sucessful series. And also the half life games, all done really well and have some of the best gameplay I've seen.

 

[Instant K4rma]

My vote goes for the Elder Scrolls series. I've liked em all since Daggerfall, and Skyrim is looking promising to say the least.