TWD: 400 Days it's the DLC to TWD season 1. It's only one episode divided in 5 "mini-episodes". In each of them you will play as one different character. As in the main game each choice you take will deeply change plot: at the end, according to your choices, you find the characters together in different situations. Gameplay is the same as the main game. Considering price, I'd suggest you all to try this out (if you appreciated the season). Your decisions in this DLC will influence season 2, too.