Free multiplayer software for linux

XTux is a multiplayer Gauntlet-style arcade game for X-windows featuring open-source mascots.
XTux runs on Linux, FreeBSD, Solaris, AIX, Irix and other unix-like systems, so players can come together from different platforms to compete in network Holywar deathmatches or work together to take on the evil Microsoft empire. Read the single player story to understand why we must fight!
Enhancements:
- mouse code
- bug fixes

Batalla Naval is a networked, multiplayer battleship game. It has robots, and support for GGZ Gaming Zone and for IPv6.

The game has two versions:

The old version called batnav includes an ncurses server and clients for ncurses, xview, win31 and gtk.
The new version called gbatnav includes a gnome server, client & robot with support for IPv6 and GGZ.

ClanBomber is a free (GPL) Bomberman-like multiplayer game that uses ClanLib, a free multi platform C++ game SDK. First "ClanBomber" was only a working title for a small game started in September 1998, that has only been started to learn how to use ClanLib.

But the ClanBomber project has grown into a real game. It is fully playable and features Computer controlled bombers, however, it is recommended to play ClanBomber with friends (3-8 players are really fun).

Cube is an open source multiplayer and singleplayer first person shooter game built on an entirely new and very unconventional engine.

Cube is a landscape-style engine that pretends to be an indoor FPS engine, which combines very high precision dynamic occlusion culling with a form of geometric mipmapping on the whole world for dynamic LOD for configurable fps & graphic detail on most machines. Uses OpenGL & SDL.

Allows in-engine editing of geometry in full 3D (you fly around the map, point / drag stuff to select it / modify it), which can even be done simultaneously with others in multiplayer (a first!). Has simplistic but effective fine grain vertex lighting that looks like lightmapping and can do dynamic lights & shadows.

Doesnt need any kind of map precompilation, even lighting is done on the fly. Has very simplistic quad-tree world structure that can do slopes (heightfields with caps) and slants, water, does decent collision detection & physics, has client/server networking that goes a long way in giving a lag-free game experience, and features a Doom/Quake-style singleplayer (2 game modes, savegames) and multiplayer (12 game modes, master server / server browser, demo recording) game with some uncompromising brutal oldskool gameplay.

Most of the engine design is targeted at reaching feature richness through simplicity of structure and brute force, rather than finely tuned complexity.

pyRacerz is a multiplayer top view 2D racing game. It features multiplayer (on the same computer), tournaments, high scores, replays, 6 tracks (really 12, because each track can be used Normal or Reverse), 9 cars, a basic robot player, 3 different levels of difficulty, and a music player (it can play the .ogg files locating in the musics directory).
Main features:
- Multiplayer (on the same computer)
- Tournament
- Challenge mode (for single user)
- Hi Scores
- Replays
- 8 tracks (1 to be unlocked)(in fact 16 because each track can be used Normal or Reverse)
- 9 cars
- Basic robot player
- 3 different levels of difficulty
- Music player (pyRacerz can play the .ogg files locating in the musics directory)

4st Attack is a game in which you have to try to out-smart your opponent. The goal of the game is to connect four of stones in a straight line. This can be horizontaly, vertically and even diagonnally.

4st Attack is a good looking connect-four with multiplayer support.

Bomba, Bechere! is a 3rd person shooter. Kill terrorists, defuse bombs,save hostages.Save Becherovka!

Terrorists has infiltrated the Becherovka factory. You have stop them! Terrorists are armed with 12g shotguns or UZI submashine guns. You have these weapons too and 9mm pistol.

Game is controled by keyoboard+mouse. Single player game only. (we work on multiplayer game).

Creators:

Programming: Ladislav "BigBoss" Dobrovsky
Level design: Daniel "Dan S." Sercel
Graphics: BigBoss and Dan S.
Linux port: Ondra "pyromanOV" Voves