C-evo - C-evo is a freeware empire building game for Windows
FreeCiv - Freeciv is an open-source, turn-based strategy game based on Civilization II.
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.
0 A.D. - 0 A. D. is a free, open-source, historical Real Time Strategy (RTS) game currently under development by Wildfire Games, a global group of volunteer game developers. Download 0 A. D.
The Battle for Wesnoth - The Battle for Wesnoth is a turn-based tactical strategy game with a high fantasy theme.
Total War - Total war is a turn based/ RTS strategy game, you play in different historical battles.