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.
ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
Xenonauts - Xenonauts attracts greatly on the sci-fi universe of the original X-COM to make a very familiar turn based tactical adventure.
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
Laser Squad Nemesis - Laser Squad Nemesis is a Turn-based Tactics, Single and Multiplayer video game developed by Codo Technologies and published by Got 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.