Like a surprise walker attack, The Walking Dead: 400 Days release sprung upon us. Depending on your platform of choice, you'll be able to start playing as early as today.

Telltale Games has produced a short but intense launch trailer that details some of the action featured in the DLC. As a reminder, you'll need at least the first episode of The Walking Dead in order to access the content. 

Interested in learning more about what's in store for 400 Days? Check out our preview from E3 2013.