The Walking Dead is an incredible comic book series, adapted to a so-so TV series and a great videogame.
The game (available on Steam) follows survivors of the zombie apocalypse, and is an adventure game. You mostly point and click to solve problems, but I think this is beside the point.
The core of the game is in it's tough moral choices, such as : "You're stuck in a room with someone dying. If he dies, he'll turn into a zombie. Do you try to save him or do you finish him to protect the others ? Oh, and you have 10 seconds to decide. And the guy in question hates you."
It's also worth mentioning that the game comes out in episodes, each with about 3 hours of gameplay. The first three are out, and I cannot wait for the next ones.