FreeCiv - Freeciv is an open-source, turn-based strategy game based on Civilization II.
ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
Freeciv for Android - Port of Freeciv to Android - similar to Civilization series.
Tropico - Tropico is an Addictive, Strategy, Construction and Management, City Building, Sandbox and Single-player Simulation developed by PopTop Software.
Widelands - Widelands is a free, open source real-time strategy game with singleplayer campaigns and a...
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.