6. Batman: A Death in the Family (1988)
Batman: A Death in the Family stands out for its unprecedented approach—DC allowed readers to vote by phone on whether Robin (Jason Todd) would live or die. Todd wasn’t landing well with fans at the time, so DC Comics had a plan, but wanted fans to make the call to end Todd’s life or not. The result was a brutal murder of the young sidekick at the hands of the Joker, sparking heated debates about the ethics of audience involvement in character fates.
The graphic violence and interactive twist pushed the boundaries of what mainstream comics could portray, leaving a lasting mark on Batman lore. Todd would return, however, assisted by the Lazarus Pit and Ra’s al Ghul. He would then become known as the Red Hood.