Strategies

FreeCol is a free and open source turn-based strategy game based on the old Colonization game and similar to Civilization

Globulation 2 is a free and open source, multi-platform, innovative Real-Time Strategy (RTS) game which reduces micro-management by automatically assigning tasks to units

Freeciv is a free and open source, multi-platform empire building strategy game inspired by the history of human civilization

Warzone 2100 is a free and open source, multi-platform multiplayer 3D real-time strategy game

LinCity-NG is a free and open source, multi-platform city simulation game and economic strategy, a polished and improved version of the classic LinCity game

UFO: Alien Invasion is a free and open source, multi-platform, real-time strategy and tactical role-playing game

Slingshot is a free and open source 2D turn-based strategy simulation game set in the gravitational fields of several planets

KsirK – free and open source computerized version of the well known strategic board game Risk

Konquest is a free and open source galactic strategy game, version of Gnu-Lactic Konquest, players conquer other planets by sending ships to them

Hedgewars is a free and open source, multi-platform, fun turn-based artillery strategy game with war hedgehogs