Warzone 2100 offers campaign, multi-player, and single-player skirmish modes. An extensive tech tree with over 400 different technologies, combined with the unit design system, allows for a wide variety of possible units and tactics.

Stockfish is a very strong chess engine. It is much stronger than the best human chess grandmasters. It can be used with UCI-compatible GUIs like ChessX.

You pilot your ship through the dreaded "Maelstrom" asteroid belt -- suddenly your best friend thrusts towards you and fires, directly at your cockpit. You raise your shields just in time, and the battle is joined.

Maelstrom is a free software port of the original shareware game for the Macintosh by Ambrosia Software, Inc. It is a fast-action, asteroids-like game, with classic pixel graphics and original sounds.

In addition to being a faithful reproduction of the original game, this version adds game controller support, mobile touch controls, and both cooperative and competitive multiplayer action.

GNOME Chess provides a 2D board for playing chess games against human or computer players. It supports loading and saving games in Portable Game Notation. To play against a computer, install a chess engine such as chess or stockfish.

Tuxemon is a monster-fighting RPG. In the spirit of other clones like SuperTux and SuperTuxKart, Tuxemon aims to create a game with its own unique style that sets it apart from other monster fighting RPGs.

BZFlag is a 3D multi-player multiplatform tank battle game that allows users to play against each other in a network environment. There are five teams: red, green, blue, purple and rogue (rogue tanks are black). Destroying a player on another team scores a win, while being destroyed or destroying a teammate scores a loss. Rogues have no teammates (not even other rogues), so they cannot shoot teammates and they do not have a team score.

There are two main styles of play: capture-the-flag and free-for-all. In capture-the-flag, each team (except rogues) has a team base and each team with at least one player has a team flag. The object is to capture an enemy team's flag by bringing it to your team's base. This destroys every player on the captured team, subtracts one from that team's score, and adds one to your team's score. In free-for-all, there are no team flags or team bases. The object is simply to get as high a score as possible.

High performance animated desktop background setter for X11 that won't set your CPU on fire, drain your laptop battery, or lower video game FPS.

Knights is a multiplayer game involving several knights who must run around a dungeon and complete various quests. Each game revolves around a quest – for example, you might have to find some items and carry them back to your starting point. This may sound easy, but as there are only enough items in the dungeon for one player to win, you may end up having to kill your opponents to get their stuff! Other quests involve escaping from the dungeon, fighting a duel to the death against the enemy knights, or destroying an ancient book using a special wand.

Speed Dreams is a car racing simulator featuring high-quality 3D graphics and an accurate physics engine, aiming for maximum realism. Initially forked from TORCS, it features improvements to the graphics and physics simulation, and supports modern input methods such as gamepads by use of the SDL library. It features more than 20 tracks and more than 80 cars to race with. Extra (freely licensed) assets can be downloaded via the in-game download manager.

With PokerTH you can play the Texas holdem poker game, either against computer opponents or against real players online.

The Legend of Edgar is a 2D platform game with a persistent world. When Edgar's father fails to return home after venturing out one dark and stormy night, Edgar fears the worst: he has been captured by the evil sorcerer who lives in a fortress beyond the forbidden swamp.

This package provides a set of udev rules for game controllers and virtual reality devices.

You are a robot moving around in a realm filled with ASCII characters. Examine humorously described though useless items as you search for a kitten among them. The theme of this Zen simulation is continued in its documentation.

GNU Shogi is a program that plays the game Shogi (Japanese Chess). It is similar to standard chess but this variant is far more complicated.

In the grand tradition of Marble Madness and Super Monkey Ball, Neverball has you guide a rolling ball through dangerous territory. Balance on narrow bridges, navigate mazes, ride moving platforms, and dodge pushers and shovers to get to the goal. Race against the clock to collect coins to earn extra balls. Also included is Neverputt, which is a 3D miniature golf game.

The asciiquarium package renders a fullscreen animation of an aquarium with various fish in the terminal, which can make for a nice screensaver.

Arx Libertatis is a cross-platform port of Arx Fatalis, a 2002 first-person role-playing game / dungeon crawler developed by Arkane Studios. This port however does not include the game data, so you need to obtain a copy of the original Arx Fatalis or its demo to play Arx Libertatis. Arx Fatalis features crafting, melee and ranged combat, as well as a unique casting system where the player draws runes in real time to effect the desired spell.

Superfluous Returnz is a 2D puzzle game set in a colourful cartoon universe. It takes place in the very quiet French village of Fochougny, an open world where players solve puzzles, find secret codes and talk to the village people to solve the mystery of the apple thief. The game is licensed as Free Software and asks for a financial donation through the game site.

Given bridge hands, Lead Solver tallies up how well each card does when led in terms of average tricks taken for the defense (for matchpoints) and how often the contract is set (for team play).

HyperRogue is a game in which the player collects treasures and fights monsters -- rogue-like but for the fact that it is played on the hyperbolic plane and not in euclidean space.

In HyperRogue, the player can move through different parts of the world, which are home to particular creatures and may be subject to their own rules of "physics".

While the game can use ASCII characters to display the the classical rogue symbols, it still needs graphics to render the non-euclidean world.

This package provides the GameStream core code for the protocol.

Pilot your ship inside a planet to find and rescue the colonists trapped inside the Zenith Colony.

Redeal is a deal generator written in Python. It outputs deals satisfying whatever conditions you specify --- deals with a double void, deals with a strong 2♣ opener opposite a yarborough, etc. Using Bo Haglund's double dummy solver, it can even solve the hands it has generated for you.

Liquid War 6 is a unique multiplayer war game. Your army is a blob of liquid and you have to try and eat your opponents. Rules are very simple yet original, they have been invented by Thomas Colcombet.