TDA is supposed to be a little bit Desktop Tower Defence and a little bit of Geometry Wars. It’s not as good as either, but it’s not terrible either. In TDA, the player controls a small ship which must fly around constructing towers to defend their base from increasingly worrying waves of enemies. Some of these beasties will hunt the player, and some will go straight for the base. Players must fend off the enemies, and then gather fallen loot to be re-invested in new towers, weapons and upgrades.