Strategy Games

OpenTTD
Free
An open source simulation game based upon the popular Microprose game "Transport Tycoon Deluxe".
Warzone 2100
Free
Command the forces of The Project in a battle to rebuild the world after mankind has almost been destroyed by nuclear missiles.
Freeciv
Free
An empire-building strategy game inspired by the history of human civilization.
FreeOrion
Free
A free, open source, turn-based space empire and galactic conquest (4X) computer game.
Battle for Wesnoth
Free
A turn-based tactical strategy game with a high fantasy theme.
Command & Conquer: ShockWave
Free
A Command & Conquer Generals Zero Hour modification, featuring new generals and much more.
OpenRA
Free
A classic Command & Conquer real time strategy games.
FreeCol
Free
A Civilization-like game in which the player has to conquer the new world.
0 A.D.
Free
A free, open-source, historical Real Time Strategy game.
Tales Of Maj'Eyal
Free
A free, open source roguelike RPG, featuring tactical turn-based combat and advanced character building.
Widelands
Free
A free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode.
TripleA
Free
An online multiplayer turn based strategy game and board game engine.
OpenClonk
Free
A free multiplayer action game in which you control clonks, small but witty and nimble humanoid beings.
War Thunder
Free
A free to play multiplayer combat game which is focused on military vehicular combat.
Royal Envoy: Campaign for the Crown
Free
Island Tribe 3
Free
StarCraft
Free
Wage war across the galaxy with three unique and powerful races.
Clonk Rage
Free
An entertaining, action-packed game of strategy, tactics, and skill.
Minesweeper
Free
Avoid the mines to win!
Royal Envoy 3
Free
Discover new islands to develop in Royal Envoy 3 Collector's Edition!