Gaia Defense

Gaia Defense is a strategy tower defense game.  Your mission in Gaia Defense is to protect and defend your bomb until the end of the cool down period.  You will need to build your units in strategic places so that you can hold off the enemy.  You can also upgrade your tower defense units so make sure you keep them at full strength.  This is a great tower defense game but it can be a little tricky so make sure that you play the tutorials before getting into the Gaia Defense TD game.