Before the announcement that a heavily narrative focussed Walking Dead video game was announced in 2012, Telltale games was a development studio that not particularly well known. Despite putting out other similar properties with Back to the Future: The Game and Jurassic Park: The Game, the products were largely met with a very mixed and ultimately tepid response from the public. The rampant acclaim and runaway success reached with The Walking Dead launched the developer into one of the most anticipated and favourable studios out there with one revolutionary product.
I think the walking dead story telling is amazing. I really love the games and think that they bring the respect of gaming story telling up in the world of entertainment in general :)