Legion TD is one of the most beloved and challenging tower defense (TD) game modes in real-time strategy history, popularized as a custom map in Warcraft III and now thriving as a standalone title, Legion TD 2 , on Steam. Unlike traditional TD where you simply build "kill zones," Legion TD is a competitive PvP tower warfare game. You send mercenaries (leaks) to your opponent while defending waves of AI creeps with your own "Legion" of fighters.