Making History: The Calm And The Storm is a single and multi-player turn based strategy game that challenges you to take command of a nation and re-write history from the start of WWII in 1936.

The Battle for Wesnoth is a single and multi-player turn based strategy game in a fantasy setting.

Armageddon Empires: A turn based strategy game in a post-apocalyptic setting versus 1 to 3 AI opponents.

Urban Legend is an isometric turn-based squad-based strategy game.

UFO: Alien Invasion is a squad-based tactical strategy game in the tradition of the old X-COM PC games.

The Continuum combines classic turn-based wargaming, collectibility and RPG character development.

Steam Brigade is is a 2-D, side-scrolling, Steam-Punk, real-time strategy game.

Dwarf Fortress is a single-player fantasy game. You can control a dwarven outpost or an adventurer in a randomly generated, persistent world.

DBA Online is a worldwide wargaming project.

Ancient Empires Lux takes you on a comprehensive trip through early history.

Transcendence is a game of space combat and adventure.

DEFCON: a stunning online multiplayer simulation of global thermonuclear war.

Darwinia: a highly original RTS by the developers of DEFCON.

Dominions 3: Leading one of over fifty possible nations in three different Ages, it is your goal to ascend to true godhood using all the power at your disposal.

Star Wars: Warlords is an excellent Star Wars complete conversion for Homeworld 2.

Call of the Warlords 2: Persistant Online Multi-Player RTS.