The Walking Dead has sold 8.5 million episodes

The Walking Dead has been good to TellTale. How good, exactly? Well, let's throw some whopping numbers around, shall we?

CEO Dan Connors told the Wall Street Journal that 8.5 million episodes have been sold in the seven months since the first season of the critically-acclaimed adventure launched.

"November and December were our biggest months. It was the culmination of the product, the game of the year awards, the retail push, and it still has a ton of head room in it," he said.

Connors said that similar price points on all platforms means a consistent revenue of about $16 per user on all formats, but mobile is the best-performing.

"The episodic model has allowed us to create an economy that works on mobile. As far as size, at this point it’s probably about 25% of the revenue of the product and it is on the largest upswing of all platforms as well," he said.

"I think we see with iOS products, we see more impact from when the show is on, when there’s stress about the show."

Asked how big the project was, Connors said TellTale drew on its experience with past games such as Monkey Island and Jurassic Park, so it had a strong technology and design base to work with.

"It’s really the culmination of years of building to this that makes The Walking Dead possible. Our tools can do these things and we are just going to keep growing from there," he said.

"Everything has been an investment in creating great storytelling and great dramatic experiences that work across multiple platforms. Cost-wise, it’s 40% more expensive than other games, but it’s not huge."

The Walking Dead is available on iDevice, Mac, PC, PlayStation 3 and Xbox 360. A retail release for consoles is available in the US.

Thanks, Kotaku.