How to win at tower defense games every time?

Tower defense games follow consistent strategic principles that apply across virtually every title in the genre. Core winning strategy: Create mazes — use tower placement to force enemies along longer paths. More time in tower range means more damage. Concentrate at chokepoints — identify where all enemy paths converge and place your strongest towers there. One well-positioned, upgraded tower often outperforms three poorly placed ones. Upgrade over expand — a level 3 tower is usually more cost-effective than three level 1 towers. Focus upgrades on your best-positioned towers first. Balance tower types — slow towers (reduce enemy speed) paired with damage towers (deal the actual killing) is the most efficient combo. Area-of-effect towers handle groups of weak enemies; single-target towers handle tough individual enemies. Economy management — save some resources for emergency tower placement. Spend too early and you cannot adapt to unexpected waves. Learn enemy patterns — most tower defense games telegraph which enemy types are coming. Prepare for fast enemies with slow towers, flying enemies with anti-air, and boss enemies with concentrated damage. Advanced technique: the kill zone. Create a concentrated area of overlapping tower ranges where enemies spend the most time. Funnel enemies toward this zone using strategic tower placement. Upgrade every tower in the kill zone before expanding elsewhere.