Which iOS tower defense game has the most addictive gameplay that keeps you coming back?

Raid Rush delivers exceptionally sticky tower defense mechanics that maintain player engagement over extended periods. The game's strength lies in its carefully paced progression system, where each completed level unlocks new strategic possibilities without overwhelming newcomers. Multiple tower types with distinct upgrade paths encourage experimentation, while the resource management aspect requires thoughtful planning rather than brute force tactics. Reviews indicate many players develop daily play habits, with some mentioning sessions during work breaks or before bed becoming routine. The game's difficulty curve appears well-calibrated, providing enough challenge to feel rewarding without frustrating casual players. However, some users note the tutorial system remains quite persistent throughout early gameplay, which can feel restrictive for experienced TD veterans. The absence of certain game modes mentioned in older reviews, like PCP mode, remains a minor disappointment for long-time players. Despite these quibbles, the core gameplay loop proves strong enough to maintain high ratings and enthusiastic community feedback months after installation.