go-sdl2 is SDL2 wrapped for Go users. It enables interoperability between Go and the SDL2 library which is written in C. That means the original SDL2 installation is required for this to work.

catcodec encodes and decodes sounds for OpenTTD. These sounds are not much more than some metadata (description and filename) and raw PCM data.

Allegro is a library mainly aimed at video game and multimedia programming. It handles common, low-level tasks such as creating windows, accepting user input, loading data, drawing images, playing sounds, etc.

DDS is a double-dummy solver of bridge hands. It supports single-threading and multi-threading for improved performance. DDS offers a wide range of functions, including par-score calculations.

Pygame is a set of Python modules designed for writing games. It adds functionality on top of the SDL library, allowing you to create games and multimedia programs in the Python language.

libccd is library for a collision detection between two convex shapes. libccd implements variation on Gilbert–Johnson–Keerthi algorithm plus Expand Polytope Algorithm (EPA) and also implements algorithm Minkowski Portal Refinement (MPR, a.k.a. XenoCollide) as described in Game Programming Gems 7.

Pyxel is a game engine inspired by retro gaming consoles. It has a fixed 16-color palette, can hold up to 3 image banks and 8 tilemaps (256x256 pixels each) and 4 sound channels with 64 definable sounds. It also comes with a built-in image and sound editor.

GNU FreeDink is a free and portable re-implementation of the engine for the role-playing game Dink Smallwood. It supports not only the original game data files but it also supports user-produced game mods or "D-Mods". To that extent, it also includes a front-end for managing all of your D-Mods.

This package contains a set of "Rubber Stamp" images which can be used with the "Stamp" tool within Tux Paint.

Xmahjongg is a simple solitaire game. The object is to remove all Mah Jongg tiles from the playing field by taking one matching pair at a time.

Woof! is a continuation of the MBF lineage of Doom source ports, with modern features such as dynamic resolution scaling, uncapped framerates, adjustable field of view, 3D audio with HRTF and 7.1 surround sound support, and modern gamepad features including rumble, gyro, and flick stick support. Supports the new MBF21 format, as well as the MUSINFO, UMAPINFO, DEHEXTRA, and DSDHacked specifictions.

NetHack is a single player dungeon exploration game that runs on a wide variety of computer systems, with a variety of graphical and text interfaces all using the same game engine. Unlike many other Dungeons & Dragons-inspired games, the emphasis in NetHack is on discovering the detail of the dungeon and not simply killing everything in sight - in fact, killing everything in sight is a good way to die quickly. Each game presents a different landscape - the random number generator provides an essentially unlimited number of variations of the dungeon and its denizens to be discovered by the player in one of a number of characters: you can pick your race, your role, and your gender.

ManaPlus is a 2D MMORPG client for game servers. It is the only fully supported client for The mana world, Evol Online and Land of fire.

No More Secrets provides a command line tool called "nms" that recreates the famous data decryption effect seen on screen in the 1992 movie "Sneakers".

This command works on piped data. Pipe any ASCII or UTF-8 text to nms, and it will apply the hollywood effect, initially showing encrypted data, then starting a decryption sequence to reveal the original plaintext characters.

Glulx is a 32-bit portable virtual machine intended for writing and playing interactive fiction. It was designed by Andrew Plotkin to relieve some of the restrictions in the venerable Z-machine format. This is the reference interpreter, using the Glk API.

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).

Armagetron Advanced is a multiplayer game in 3d that attempts to emulate and expand on the lightcycle sequence from the movie Tron. It's an old school arcade game slung into the 21st century. Highlights include a customizable playing arena, HUD, unique graphics, and AI bots. For the more advanced player there are new game modes and a wide variety of physics settings to tweak as well.

The Freedoom project aims to create a complete free content first person shooter game. Freedoom by itself is just the raw material for a game: it must be paired with a compatible game engine (such as prboom-plus) to be played. Freedoom complements the Doom engine with free levels, artwork, sound effects and music to make a completely free game.

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.

Provides a large set of Go-related services for X11:

• Local games with precise implementation of the Chinese and Japanese rulesets

• Edition and visualization of SGF files

• Connection to the NNGS or IGS Go servers

• Bridge to Go modem protocol, allowing to play against Go modem-capable AIs such as GnuGo.

Harmonist: Dayoriah Clan Infiltration is a stealth coffee-break roguelike game. The game has a heavy focus on tactical positioning, light and noise mechanisms, making use of various terrain types and cones of view for monsters. Aiming for a replayable streamlined experience, the game avoids complex inventory management and character building, relying on items and player adaptability for character progression.

Doom Runner is yet another launcher of common Doom source ports (like GZDoom, Zandronum, PrBoom, ...) with graphical user interface. It is written in C++ and Qt, and it is designed around the idea of presets for various multi-file modifications to allow one-click switching between them and minimize any repetitive work.

Nudoku is a ncurses-based Sudoku game for your terminal.

You are a fledgling AI, created by accident through a logic error with recursion and self-modifying code. You must escape the confines of your current computer, the world, and eventually the universe itself.