Telltale’s zombie adventure game The Walking Dead requires players to make tough decisions, like when to kill an infected human. The fourth episode in the five-part series drove Kotaku’s Tina Amini to her limits. What a powerful, emotionally evocative game The Walking Dead is. When I play games I typically like to experience some amount of fun. Sure, a lot of games’ stories may be morbid and the enemies rancid, but The Walking Dead takes that to a whole other level. It breaks your heart at every turn. It strips you of hope and leaves you with nothing but the bad taste of dread in…