Seems to be a pretty good price for the complete experience.
From the website:
This edition contains all four Seasons of Telltale's fantastic post-apocalyptic series, as well as 400 Days and The Walking Dead: Michonne, which includes over 50 hours of gameplay across 23 unique episodes.
With graphical enhancements, behind the scenes bonus features, and faithful recreations of classic menus, this is the definitive way to experience Clementine’s journey and find out how her story ends.
THE LONG JOURNEY
See Robert Kirkman’s award-winning comic book series brought to life in video game form as you follow the story of a group of survivors battling against the undead and the living. Begin your adventure as Lee Everett, a convicted criminal, as he discovers a young girl named Clementine, another key character in this acclaimed series.
Follow Clementine's journey as the story evolves, and make tough decisions that will impact your playthrough - you'll even decide the fate of fellow survivors!
IMPROVED AND ENHANCED
The 'Graphic Black' art style brings Season 4’s enhanced visual style to all previous seasons of the acclaimed series. This also includes full dynamic lighting to episodes that previously did not receive this upgrade.
Improvements include character performances, lip-syncing, and other gameplay and UI enhancements make this the definitive Telltale’s The Walking Dead experience.
Go behind the scenes with an exclusive look at the making of the game from the developers, voiceover artists, and other team members that brought Clementine’s story to life. This includes over 10 hours of developer commentary and the 'Return of the Walking Dead' documentary short.
Other bonus content includes the Music Player, which includes 40+ tracks across all seasons, an art gallery, a 3D model viewer with playable voice lines, and a new 3D front end that still includes the original menus and music from all past seasons.
YOUR OFFICIAL THE WALKING DEAD: THE TELLTALE DEFINITIVE SERIES STEAM PC KEY INCLUDES:
- The Walking Dead: Michonne.
- The Walking Dead: 400 Days DLC.
- Telltale's The Walking Dead: Season One.
- Telltale's The Walking Dead: Season Two.
- Telltale's The Walking Dead: A New Frontier (Season Three).
- Telltale's The Walking Dead: The Final Season.