John Erikson writes "Tower Defense games are popular right now with quite a few already available for the PC and even on the high definition console stores. Hidden Path Entertainment recently released Defense Grid: The Awakening on Steam but for $20 does it bring enough to the table to make it an addictive and fun experience?
Defense Grid is set in the future where you have to defend the remains of a civilisation from an alien menace. To do this you must stop the power cores getting into Alien hands. On every level aliens enter the map and travel the shortest path to the power cores then make a run back carrying them to the exit. If they escape with the cores then they are lost for good and if you lose them all then you lose that level and have to start again."