The original Colossal Cave Adventure from 1976 was the origin of all text adventures, dungeon-crawl (computer) games, and computer-hosted roleplaying games. This is a forward port of the last version released by Crowther & Woods, its original authors, in 1995. It has been known as ``adventure 2.5'' and ``430-point adventure''.

0ad-data provides the data files required by the game 0ad.

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.

OpenTTD is a game in which you transport goods and passengers by land, water and air. It is a re-implementation of Transport Tycoon Deluxe with many enhancements including multiplayer mode, internationalization support, conditional orders and the ability to clone, autoreplace and autoupdate vehicles. This package only includes the game engine. When you start it you will be prompted to download a graphics set.

OpenQuest is a two room adventure game that follows two aliens who come to Earth in search of a stolen artifact.

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.

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.

LTris is a tetris clone: differently shaped blocks are falling down the rectangular playing field and can be moved sideways or rotated by 90 degree units with the aim of building lines without gaps which then disappear (causing any block above the deleted line to fall down). LTris has three game modes: In Classic you play until the stack of blocks reaches the top of the playing field and no new blocks can enter. In Figures the playing field is reset to a new figure each level and later on tiles and lines suddenly appear. In Multiplayer up to three players (either human or CPU) compete with each other sending removed lines to all opponents. There is also a Demo mode in which you can watch your CPU playing while enjoying a cup of tea!

This package provides a reimplementation of the 1997 Bullfrog business simulation game Theme Hospital. As well as faithfully recreating the original engine, CorsixTH adds support for high resolutions, custom levels and more. This package does not provide the game assets.

Tux Paint is a free drawing program designed for young children (kids ages 3 and up). It has a simple, easy-to-use interface; fun sound effects; and an encouraging cartoon mascot who helps guide children as they use the program. It provides a blank canvas and a variety of drawing tools to help your child be creative.

Badass generates false commits for a range of dates, essentially hacking the gamification of contribution graphs on platforms such as Github or Gitlab.

The Butterfly Effect (tbe) is a game that uses realistic physics simulations to combine lots of simple mechanical elements to achieve a simple goal in the most complex way possible.

AntiMicroX is a graphical program used to map gamepad keys to keyboard, mouse, scripts, and macros under both X.org and Wayland. With it you can control your system using a gamepad or play games that don't natively support gamepads. It can also be used for generating SDL2 configurations.

For unprivileged access to input events, this package provides udev rules for use with udev-service-type.

This package contains the assets for the Vdrift racing game.

PipeWalker is a simple puzzle game with many different themes: connect all computers to one network server, bring water from a source to the taps, etc. The underlying mechanism is always the same: you must turn each tile in the grid in the right direction to combine all components into a single circuit. Every puzzle has a complete solution, although there may be more than one.

This package provides a reimplementation of the classic Xjump game, using SDL instead of Xlib.

ReTux is an action platformer loosely inspired by the Mario games, utilizing the art assets from the SuperTux project.

FIFE is a multi-platform isometric game engine. Python bindings are included allowing users to create games using Python as well as C++.

GNUbik is a puzzle game in which you must manipulate a cube to make each of its faces have a uniform color. The game is customizable, allowing you to set the size of the cube (the default is 3x3) or to change the colors. You may even apply photos to the faces instead of colors. The game is scriptable with Guile.

Barrage is a rather destructive action game that puts you on a shooting range with the objective to hit as many dummy targets as possible within 3 minutes. You control a gun that may either fire small or large grenades at soldiers, jeeps and tanks. The gameplay is simple but it is not that easy to get high scores.

Dr. Robotnik's Ring Racers is a kart racing game drawing inspiration from ``anti-gravity'' racers, fighting games, and traditional-style kart racing. Ring Racers is designed with an emphasis on player agency in the face of highly technical game-play challenges in both single-player and online multiplayer modes.

Leela-zero is a Go engine with no human-provided knowledge, modeled after the AlphaGo Zero paper. The current best network weights file for the engine can be downloaded from https://zero.sjeng.org/best-network.

Endless Sky is a 2D space trading and combat game. Explore other star systems. Earn money by trading, carrying passengers, or completing missions. Use your earnings to buy a better ship or to upgrade the weapons and engines on your current one. Blow up pirates. Take sides in a civil war. Or leave human space behind and hope to find friendly aliens whose culture is more civilized than your own.

This program generates bridge hands. It can be told to generate only hands satisfying conditions like being balanced, having a range of High Cards Points (HCP), controls, or other user-definable properties. Hands can be output in various formats, like PBN for feeding to other bridge programs, Deal itself, or split up into a file per player for practise.