If you are looking for a realistic shooter experience on the Wii, these are the official titles available: CoD 4: Modern Warfare (Reflex Edition): The best-optimized port for the console. CoD: Modern Warfare 3:
Whether you play it on a CRT TV with a Wii Zapper, or upscaled to 4K on Dolphin with a mouse and keyboard, this version offers a genuinely different flavor of MW2. Call Of Duty Modern Warfare 2 Wii Iso