`` XCOM : Enemy Unknown '' combines resource management and combat strategy . The game is set in the year 2077, where humanity has colonized space. Designer says the elements felt lacking by themselves . The game was released Tuesday in North America .
`` XCOM : Enemy Unknown '' combines resource management and combat strategy . Turn-based game is from Sid Meier 's Firaxis Games . Designer says the elements felt lacking by themselves . The game was released Tuesday in North America .