Natural Killer: El Cuerpo Bajo Ataque 2025

Natural Killer: is a hidden-role card game that thrusts you into the intense conflict between the immune system and infectious viruses. Each player starts as a defensive cell (such as T or B lymphocytes, Natural Killers, etc.), but a dangerous Virion can infiltrate and convert anyone into an agent of the Virus.

Throughout the game, players draw and play cards representing immune system actions—revealing symptoms, exchanging hands, or even stealing cards from others. Symptom Cards are vital for identifying which virus has invaded: as more symptoms are placed in each player’s “Antigen Zone,” it becomes clearer which Virus is at work. However, infected players can bluff or manipulate card exchanges to secretly spread the disease.

The Immune System seeks to deduce the correct Virus and use the specific Treatment to neutralize it, ensuring no one remains infected. Conversely, the Virus aims to infect all or leave only a few immune players while covertly passing the Virion card. Special cards like Interferon can cure an infected player, but there are restrictions that add to the game’s tension and strategic depth.

With shifting roles, deduction through Symptom analysis, and the ever-present threat of infection, Natural Killer delivers a blend of strategy, negotiation, and bluffing. Every choice matters—one misstep could doom the entire body, while careful play can save it from total collapse.

—description from the publisher