Well as per recommendations from here, i purchased all season packs of Walking dead season 1 & 2. By the way the season 2 episode 2 will be released anytime now, as per telltale games. So thats awesome!! And i got wolf among us all packs too, Now these games genre got me hooked up so if anyone knows more games as such episodic series, please let me know.
Hmmm... Do you mean adventure games? Those tow aren't your run of the mill adventure games but I guess that's the genre they fit best in... Have you tried republique?
I believe Telltale's Back to the Future is quite similar, though obviously the story isn't anywhere near as dark.
TWAU and TWD are very effective at the story telling bit (which is the meat of their gameplay), mainly because of the theme. If you like Jurassic Park is also pretty good, but lacking IMO in giving you more control. The area-travel mechanic for one would have been so much better if they gave you a virtual joystick instead. In this genre, i also like Yesterday, Lost Echo and Stargate SG-1, although SG-1 is only just 2 episodes in so far.