Thing I dont see implemented enough in tower defences, the ability to set your turrets AI's so they dont all just end up attacking the guy in the front until hes outta range. It hurts most when the super power turrets shots get wasted on a almost dead anyway creep, when a simple attack target with highest health AI would be more effecient. + If you think its a good detail to add to the simple TD
 "Simple Tower Defence!"){kind=icon}
 "Reincarnation: The Backfire Of Hell"){kind=icon}