What is the best strategy for tower defense games?

Tower defense games combine strategic planning with real-time decision making. The core objective: prevent enemies from reaching your base by building defensive towers along their path. Universal strategies: Create mazes: Use towers to force enemies into longer paths. The more time enemies spend in range of your towers, the more damage they take. Concentrate firepower: Place your strongest towers at chokepoints — narrow areas where all enemies must pass. A few powerful towers at the right location beat many weak towers spread around. Upgrade over expand: Upgrading existing towers is usually more cost-effective than building new ones. A level-3 tower often outperforms three level-1 towers at similar total cost. Balance tower types: Mix slow towers (which reduce enemy speed, letting other towers deal more damage) with damage towers. Area-of-effect towers handle groups, while single-target towers handle tough individual enemies. Economy management: Don't spend all your resources immediately. Save some for emergency towers if enemies breach your defenses. Late-game strategy: As enemies get stronger, you need either specialized towers (for specific enemy types) or heavily upgraded general-purpose towers. The key to mastering tower defense is understanding that positioning matters more than raw power.