Be a blood donor hero! Learn how blood donation saves lives as you play either BLOOD FEUD - a 2 player game or REVIVR - 3-8 player game BLOOD FEUD: Like in the popular card game "WAR", players use blood type matching rules to win pints and control the blood supply. REVIVR: With the blood pints you are dealt, compete with your friends in a high-stakes game of life and death to save the most patients. Allow 7-14 business days for delivery.