X-COM - X-COM is a Science-Fiction, Turn-base Tactics, Strategy and Single-player video game series developed by Mythos Games and published by MicroPose.
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
Xenonauts - Xenonauts attracts greatly on the sci-fi universe of the original X-COM to make a very familiar turn based tactical adventure.
ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
Hogs of War - Hogs of War is an Action-Adventure, Turn-based Tactics, Strategy, Single and Multiplayer video game published by Alternative Software.
Rise of Nations - Rise of Nations was launched back in 2003 but is still considered to be one of the most popular and effective real-time strategy (RTS) games of all time.