No series has defined the past and present of turn-based strategy more than XCOM. The Firaxis-made games in the series, XCOM: Enemy Unknown and XCOM 2, are two of the best games of the last decade. The whole series, which dates back to the mid-'90s, is one of PC gaming's most beloved, even with its history of forcing us to make painful decisions and the questionable third-person shooter spinoffs...
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