Humble Bundles got a deal on with building your own bundle for the Telltale series. 80% off for 3 games, 83% for 4 & 85% for 5.
An example of this could be;
Back to the Future: The Game - £2.25
Game of Thrones: A Telltale Games Series - £3.45
The Walking Dead: 400 Days - £0.60
The Walking Dead: Michonne - A Telltale Miniseries - £1.65
The Walking Dead: Season 2 - £2.85
Alternatively build your own :)