ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
Rail Nation - Become a logistics tycoon in this fascinating railroad strategy game.
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
OpenTTD - An open-source clone of the classic game ...
The Settlers Online - The Settlers is a free web browser based strategy game along with a gameplay that drops anywhere between Age of Empires and the online strategy style.
RollerCoaster Tycoon Classic - Create and run amazing parks on your iPhone or Android.