Call of Duty is a long-running military shooter series. Warzone and recent full titles combine battle-royale, multiplayer, and seasonal updates. The franchise remains a console and PC favorite thanks to polished gunplay and content drops. Player Base (Estimated Monthly): Typically 40-70 million MAU across combined modes (Warzone and main games). Why It’s Popular: High-production competitive multiplayer, seasons with new maps and modes, and strong console performance.