Defense Technica [Online Game Code] Powerful Towers - Select from 8 different tower classes and upgrade to build a nearly impenetrable defense of over 40 different towers. Arm towers with machine guns, long-range missiles, flamethrowers, mortars, lasers, and other powerful weapons to halt the oncoming hordes in their tracks! Dynamic Battlefields - Variable enemy pathfinding, arduous weather systems, and physical changes in terrain during battles require a shift in strategy and keep each playthrough fresh. Gorgeous 3D Visuals - Fully 3D backgrounds and amazing lighting effects set the scene for intricately detailed towers and enemy hordes. Maps range from orbital military installations and subterranean ruins to floating islands and futuristic cities. Formidable Opposition - Battle against nine different enemy types across three different classes each with a strength and weakness against certain tower types requiring careful thought on tower placement.