From what I've seen it looks like a Choose Your Own Adventure/Heavy Rain type of game with gore. Here's more details on price:
How Much Does Walking Dead Cost? Release Date?
As it's coming to so many platforms, keeping track of how much The Walking Dead: The Game will cost you has been tough. If you're buying it on the PC or Mac, you get a five-episode season pass for $24.99 on Tuesday, April 24th. (EU gets the PC/Mac version for 24.99 Euros on Tuesday, too.) If you buy on PlayStation 3, you can grab each episode for $4.99 or buy the five-episode season pass for $19.99 on Tuesday, April 24th. (EU gets the PS3 episodes one by one for 4.99 Euros and the season pass for 19.99 Euros starting on Wednesday, April 25th.) If you get it on Xbox 360, there is no season pass so you'll have to pay 400 Microsoft Points per episode sometime this month.
I'll be getting it on ps3 for the season pass alone.
Here's ign's video review:
Does anyone have it yet? Your impressions.