X-COM: Apocalypse is the third game in the X-COM series of computer games. Similar to the first two games, Apocalypse features a map-like management mode (the Cityscape) and an isometric combat mode (the Battlescape). The management mode takes place in a single city, called Mega Primus, rather than being spread out over the entire planet Earth as in the previous games. In addition, Apocalypse was the first game in the X-COM series to include a real-time combat option as well as the traditional turn-based mode. A new feature is the choice of playing the tactical missions in either the familiar turn-based mode or real-time.