One of my favorite Tower Defense games. Unfortunately, it does not work on Kongregate nor on many other flash websites. The only version of the game I've found that work is the one labeled as Warzone Tower Defense Extended. The Extended version has bug fixes, more maps, and a 5th upgrade tier, but even those versions don't allow functionality of the 5th tier, because they require both Mochi and GamerSafe for the "Upgrade Store", yet both of those sites have been down since 2014. I have no idea what the game's future will be when Adobe ends Flash support at the end of the year.
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