Command & Conquer: Tiberium Alliances - Command & Conquer: Tiberium Alliances is one of the best game for those players who love playing MMORTS games.

FreeCiv - Freeciv is an open-source, turn-based strategy game based on Civilization II.

Command and Conquer - Are you ready for the ultimate real-time strategy experience? Gather resources, build your base, and create the most powerful armies in the world before engaging the enemy in all-out war.

Sid Meier’s Civilization VI - Sid Meier’s Civilization VI is a Turn-based Strategy, War, Tactical, Single and Multiplayer video game created by Firaxis and published by 2K.

Supreme Commander - Supreme Commander is Real-time Strategy, Sci-fi, Building, Space, Co-op, Single and Multiplayer video game developed by Gas Powered Games and published by THQ.

C-evo - C-evo is a freeware empire building game for Windows