Attack Tower Series app for iPhone and iPad

This is a free tower defense game. Or in short TD. Its free to play.
Your soldiers are prepared to fight to the death. Build towers in strategic locations to defend your base. You can perform essential upgrades and repairs during battle.
Best free defense game! Much fun!

How to play:
*Objective
Protect roads from enemy attacks. When an enemy is defeated, you will earn money and experience points. Spend your money to upgrade towers or build more towers. Tower type and position is is the essential strategy of the game. Spend experience points to use super powers or permanent tower upgrades.

*Towers
Build towers to stop enemies. Every tower has different effect. For example "Machine Gun" has little effect on tanks but very effective on other enemies. Check in game help screen for more information.

*Tower Upgrade
Every tower has 3 upgrade level. Upgrade effects towers attack, effect radius and reload times. To upgrade, tap on desired tower and click upgrade icon.