Upgrade Tower Defense

Build the defensive fortresses, and devise your own TD strategy to dominate your enemy’s armies! This game is free and don't need to be online to play!
**** Here's what we've got for you: ****
- Enjoy 24 exciting tower defense levels
- 10 specialized tower upgrades to customize your strategy
- Over 10 different enemies
- 4 Different world themes: grassland, desert, ice, and lava
- 3 difficulty options: easy, medium and hard
- High definition awesome illustrated cartoon art
- Over 40 achievements
- Challenge with your friends in leaderboards.