According to The Walking Dead's co-creator and writer Robert Kirkman, he became interested in making a game based on the comic after playing Strong Bad's Cool Game for Attractive People. Sometime later, Telltale Games would successfully pitch their idea of a Walking Dead game to him:

"I played their Strong Bad game. I like their approach to puzzle-based storytelling. I thought they were more focused on telling a good story, and I thought they were good at engaging the player in the narrative. That's what interested me in making a Walking Dead game. They came to me with a proposal that involved decision-making and consequences rather than ammunition gathering or jumping over things; I was impressed by that. The only thing that's really special about The Walking Dead is the human characters and the narrative that they exist in. It's all about drama and loss, so I felt like doing a game with that focus, but that wasn't something that I knew was really possible. When Telltale came and told me about the way that making decisions changed the game and the way that players would be forced to choose between two bad decisions and how the survival aspect of The Walking Dead would actually be brought to the forefront – that's when I was sold on the game."
Contributed by MehDeletingLater