Boson A real-time Linux strategy game for two players. (Open Source, GNU GPL) http://boson.eu.org/

Advanced Strategic Command A turn based strategy game for Linux or Windows. (Open Source) http://www.asc-hq.org/

Attal: Lords of Doom Turn-based strategy game for Linux in which you control bases and manage fighting lords. http://attal.sourceforge.net/en_pages/en2_nt_news.shtml

The General Turned based military strategy game for Windows in which you control a nation. Your goal is to unite the world under your rule, upon conquering all the other states. http://newgame.agava.ru/eng/g_news.html

Phobia III Choose your weapon and tactics to slaughter as many of the aliens that swarm you as possible. Features stunning graphics for Windows or Linux. http://www.lynxlabs.com/phobiaIII/

Constellation! Constellation is a 2D turn-based pure-multiplayer strategy / combat game for Windows with a space theme. Well suited to be played by email. http://groups.msn.com/Constellation/_whatsnew.msnw?pgmarket=en-us

Xconq Civilization style game for Unix/Linux/X11, Macintosh, or Windows. Features multiple AIs, networking for multi-player games, and a game library. http://sources.redhat.com/xconq/

Boa game A multi-player clone of the worm(6). Includes, server, client, and bot. Source can be compiled for SGI, Linux, Sun or Gnuwin32. http://www.tarunz.org/~vassilii/pub/boa/

CivQuest Turn-based Civilization clone written in Java. (Open Source, GNU GPL) http://civquest.sourceforge.net

Pocket Civ Turn-based Civilization clone for Palm OS. http://geocities.com/icepirates2/pocketciv.html

C-evo Turn-based empire building strategy game for Windows. (Open Source) http://www.c-evo.org

Planetasia Space strategy game for Windows. http://planetasia.freecyberzone.com

Overlord '44 Overlord '44 is a 3D real-time strategy game about the D-Day landings. You will command either the Allies trying to get further inland or the Axis trying to repel the Allies. http://www.freewebs.com/overlord1944/

The Colonization II Project Project to create an alternative sequel to the turn-based strategy game Colonization by Sid Meier. http://www.civgaming.net/col2

FreeRails Multiplayer real-time strategy game inspired by Railroad Tycoon and Railroad Tycoon II. Written in both C++ and Java. (Open Source, GNU GPL) http://freerails.sourceforge.net

Castle Combat A clone of Rampart for Linux. Two players build castle walls, place cannons inside these walls, and shoot at the walls of their enemies. http://user.cs.tu-berlin.de/~karlb/castle-combat/

L-O-C Turn-based strategy game with some strong RPG elements, based on a game by Julian Gollop. Runs under MS-DOS, Windows and Linux by using an Atari emulator. (Open Source, GNU GPL) http://l-o-c.sourceforge.net

Cult Using negotiation and trade, one must resolve a situation involving cultists barricaded in a villa two kilometers away from town. (Windows) http://www.studio-blum.com/cult/

Marbles Create figures out of single marbles. One-way streets, crumbling walls and portals make the task interesting. (Linux) http://lgames.sourceforge.net/index.php?project=Marbles

Scorched Island 3D Combines tactics from popular game Scorch and elements from RPG games for DOS or Linux. http://cvs.linux.hr/si3d/