City Defense 2 challenges you to fortify metropolitan blocks against endless red stickmen incursions. Shop for barricades, gatling nests, electric fences using wave-clear rewards. Position defenders wisely—cover lanes, support overlaps, counter flanks. Escalating threats include armored brutes and aerial drops, necessitating diverse counters. Intuitive drag-and-drop deployment plus hotkey upgrades streamline chaos. HUD displays funds, wave timer, morale. Visual flair in explosions and ragdoll physics complements core loop. Campaign mode unlocks mega-structures and superweapons. Bite-sized rounds suit mobile play; depth hooks strategy enthusiasts for hours of escalating urban warfare mastery.