Best free Mac OSX strategy games

Strategy games are video games in which the player must carefully plan each move to progress and achieve victory. Most strategy games use a top-down or isometric perspective to help the player manage armies, construct buildings, and oversee resources. Gameplay often involves exploration, economic management, and tactical combat. Some of the most popular strategy subgenres include real-time or turn-based strategy, 4X games (eXplore, eXpand, eXploit, eXterminate), and wargames.