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Liquid War

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Liquid War is a unique multi-player action game. It is based on an original shortest path algorithm and core concept by Thomas Colcombet and programmed by Christian Mauduit.


Gameplay takes place on a 2D battlefield, usually with some obstacles. Each player (2 to 6, computer or human) has an army of particles and a cursor. The objective of the game is to assimilate all enemy particles. The players can only move their cursors and cannot directly control the particles. Each particle follows the shortest path around the obstacles to its team's cursor. A player may have several thousands particles at a time, giving the collection of particles a look of a liquid blob. When a particle moves into a particle from a different team, it will fight and if the opponent particle fails to fight back (it is not moving in the opposite direction) it will eventually be assimilated by its attacker. As particles cannot die but only change teams, the total number of particles on the map remains constant. Since a particle can only fight in one direction at a time (towards its team's cursor), a player that surrounds its opponents will have a distinct advantage. The game ends when one player controls all of the particles or when the time runs out. When the time runs out, the player with the most particles wins.

The are multiple maps which affect the obstacles in the battlefield. These obstacles may affect the strategies of the game.

Liquid War is a multiplayer game and can be played by up to 6 people on one computer, or over the Internet or a LAN. A single player mode is available in which the opponents are controlled by the computer. The computer AI's "strategy" is to constantly choose a random point in the enemy and move its cursor to it.


The Liquid War shortest path algorithm was invented by Thomas Colcombet before the game itself. The game came as a result of the algorithm, when he realized its applicability to gaming. Colcombet's friend, Christian Mauduit, enhanced the algorithm and coded the game.

Liquid War 3.0 was released on 1 July 1995. It was a "barely usable"[1] DOS game with no network support. Version 5.0 was released on 26 September 1998. It was a complete rewrite and used the Allegro library. Network support was introduced in version 5.4.0, released on 7 July 2001. In 2002, Liquid War received the Most Original Linux Game award by The Linux Game Tome,[2] and in 2003 it was nominated for the Les Trophées du Libre, an International Free Software Competition.[3] As of July 2008, the current version is 5.6.4 and is available under DOS, Microsoft Windows, Mac OS X, Linux and FreeBSD. Its author, Christian Mauduit, has announced that a complete rewrite is in progress to produce version 6.0, which will abandon the Allegro library used for 5.x releases for a full OpenGL implementation. Version 6.0 is a part of the GNU project and was expected to be released in 2008. Version 0.0.7 beta, a testing version, was released in October 2009. Version 0.0.8 beta has been released in 2010. While there still isn't network support, most parts of the game and engine are finished and playing hotseat and/or against bots works fine, just like version 5.x.


  1. release information in “Changes.txt”
  2. And the winners are.... (28 January 2003). Retrieved on 2007-10-21.
  3. 2003 - First competition (French). Les Trophées du Libre. Retrieved on 2008-07-24.


External links

Template:Open source video gamesfr:Liquid War

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