"UFO: Aftermath, is a 2003 real-time strategy game with real-time tactical battles from ALTAR Interactive, being a homage to the X-Com series of games. It started as The Dreamland Chronicles: Freedom Ridge being produced by the Mythos Games, original developers of the X-COM series, until 2002 when it was bought by ALTAR and restarted.
In concept, the game is similar to unreleased X-COM: Genesis. Player assumes the role of the Earth's last hope - the commander of the last, scattered humans left on the planet. It is up to him to guide your forces through the planet's time of crisis, and overcome the alien threat. UFO: Aftermath combines global strategy with tactical missions, weaving them together with a storyline and a strategic, RPG-like approach to each soldiers attributes and skills.
With its roots deeply in the X-Com series, the game combines elements of strategy with squad-based tactics. The game therefore consists of two separate parts which are played alternately: A strategy phase in which the player controls and expands his organization, and a tactical phase in which player-controlled units do battle with alien enemies.
The strategic phase allows the player to outfit his/her troopers for action, acquire new equipment and personnel, and conduct research to enable the production of more advanced equipment. Mission markers pop up on the globe indicating locations where a team can be dispatched to do battle. Winning or losing a battle may have the effect of expanding the player's territory, allowing more access to resources which enable further expansion. This is much in line with X-Com strategic mechanics.
The tactical game can be described as pause-based real-time combat. All combatants on the tactical battle area move and act simultaneously, rather than using turns. The player can pause time (or tell the game to automatically pause on certain events), and issue orders to his/her troopers, which will only be carried out once time is unpaused. Also in deviation from the X-Com series, the battlefield is presented in fully rotatable 3D, and as such dispenses with the technical limitations of isometric view."
Source: Wikipedia, "UFO_Aftermath," available under the CC-BY-SA License.