Enter the world of microscopic battles for health. Guide white blood cells (leucocytes) to occupy cells and destroy invading pathogens, including bacteria and viruses. Use medicines of varying potencies to power antibodies to assist your white blood cells in battle. Help your white blood cells win by attacking pathogen-occupied cells that have adjacent leucocyte-occupied cells. Tackle various levels with different cell arrangements, providing opportunities for new tactics and engagement. Purchase new characters, levels, and medicine packs in the Game Shop to enhance your gaming experience with hours of fun. Refer to the in-game manual to help you understand how to beat the game and make the most of this thrilling experience.