Cellf Defense is a fast-paced action strategy game where you command microscopic defenders inside a living cell. As waves of invading viruses and bacteria attack, you must deploy specialized immune units, upgrade your defenses, and adapt to evolving threats. Master the balance between offense and resource management to keep your cell alive. With vibrant visuals, challenging levels, and relentless enemies, only the sharpest strategist can survive the microscopic battlefield. Mouse click or tap to play