Xtank is a fairly old but reliable graphical game requiring multiple players and optimised for a local area network of X displays. It features fast update rates, assorted mazes, various vehicles, simple graphics, drone tanks, and team play. Different game styles are possible; straight combat, territorial expansion, maze races with and without weapons, and ultimate frisbee. The "north" development branch is James Cameron's modifications to the 1.3f version for use on 800x600 displays in a network of Linux based second-hand gaming workstations in a rural village.
"The Game" is a project designed to simplify the process of producing any high-quality cross-platform 2D or 3D graphical computer game. The hope is that any game can be produced simply by changing a few settings and pressing a "compile" button. The project has three "deliverables": a game engine library to abstract across the set of all possible computer games (applying object-oriented design methods to the general problem in such a way as to be usable in specific instances); a graphical interface for easy game design (an exercise in human interface design); and a gaming package with a lot of shiny games to play.
jIsoEngine is an isometric 2D engine for Java applications. It provides an SDK of methods and classes that let developers easily build a complete game. It is suited for simulation games, board games, and turn-based games. The project is bundled with Tourist Camping Tycoon, a game developed with the engine.
Freeciv is a multiuser reimplementation for Unix/X of the famous Microprose game of Civilization. By default, the game is an improved Civ II, but this can be customized; modpacks for near-100% compatibility with Civ I and Civ II are included. Multiuser gameplay is real-time: in each turn, all human players move concurrently. The game is designed to remain fairly playable even on poor network connections. Freeciv can also be played on standalone machines, and its AI players are a good challenge for beginners. The source code comes with the server, two X clients, and non-X clients for MS Windows and Amiga. Freeciv is released under the GNU General Public License. It is maintained by an international team of coders and enthusiasts, and is easily one of the most fun and addictive network games out there.
SpaceZero is a RTS 2D space combat game for two players over a network. The objective is to conquer the space, defeating all enemies. At the starting point, you have only one ship and one planet, but you have money to buy more ships to conquer more planets. All the ships can be controlled by the computer (automatic mode) or by the player (manual mode). You can easily change among your ships, controlling all of them independently.
Scorched 3D is a modernization of the classic DOS game Scorched Earth ("The Mother Of All Games"). It incorporates a lively three dimensional landscape that includes animated jets, naval vessels, water, and even birds, in addition to detailed tanks and projectiles. Other enhancements include LAN and Internet play and music.