Players in the Quarantine Zone can undertake the quest "Modern Prometheus," which involves a survivor named Stuart who arrives with a zombified head and requests additional zombie body parts for an experiment. To complete the quest, players must reach day 20, allow Stuart entry into the survivor block, ensure his safety, confiscate body parts from survivor baggage, and engage in conversation with him after collecting four parts.
After admitting Stuart, players must protect him from threats while sourcing the necessary zombie body parts, which cannot be obtained from liquidation or the laboratory. Once all four parts are collected, players discuss the experiment with Stuart, who ultimately meets his demise, leading to a small outbreak of zombies in the survivor base. Players must then eliminate the zombies and can collect a reward of 0 and a severed head collectible from Stuart's belongings.