Upgrade Tower Defense is a captivating strategic tower defense game available on iPhone. Build defensive fortresses and craft your own winning strategy against enemy armies. The game offers 24 thrilling tower defense levels where you can showcase your skills. With 10 specialized tower upgrades, you can customize your defense strategy to outsmart your opponents.

Immerse yourself in the game's diverse world with over 10 different enemies to combat across 4 unique themes: grassland, desert, ice, and lava. Choose from 3 difficulty options - easy, medium, and hard - to tailor the challenge to your skill level. Upgrade Tower Defense features high-definition cartoon art, over 40 achievements to unlock, and the opportunity to compete with friends on leaderboards.