The Walking Dead: The Telltale Definitive Series

The Walking Dead: The Telltale Definitive Series is a collection of all Telltale's seasons set in Robert Kirkman's comic universe, published by Skybound Games. It includes four seasons, 400 Days and The Walking Dead: Michonne, 23 episodes in all. The central figure is the girl Clementine, learning to survive among the undead and the living.

It is an interactive drama: you talk, make choices at key moments and see how they change the way characters treat you. There are quick reaction events and light scene exploration, but the weight lies in the moral dilemmas and story, not combat.

According to HowLongToBeat (via DekuDeals), a solo run takes about 46 hours; the store page claims over 50. At about 2 hours a day (roughly 60 hours), a month is enough to finish it all. The game is single-player, so it is fully available under the offline rental, though the story demands your attention.