fheroes2 is an implementation of Heroes of Might and Magic II (aka HOMM2) game engine. It requires assets and game resources to play; it will look for them at ~/.local/share/fheroes2 folder.

FreeOrion is a turn-based space empire and galactic conquest (4X) computer game being designed and built by the FreeOrion project. Control an empire with the goal of exploring the galaxy, expanding your territory, exploiting the resources, and exterminating rival alien empires. FreeOrion is inspired by the tradition of the Master of Orion games, but is not a clone or remake of that series or any other game.

UltraStar Deluxe (USDX) is a karaoke game. It allows up to six players to sing along with music using microphones in order to score points, depending on the pitch of the voice and the rhythm of singing.

GNU Go is a program that plays the game of Go, in which players place stones on a grid to form territory or capture other stones. While it can be played directly from the terminal, rendered in ASCII characters, it is also possible to play GNU Go with 3rd party graphical interfaces or even in Emacs. It supports the standard game storage format (SGF, Smart Game Format) and inter-process communication format (GMP, Go Modem Protocol).

Fizmo is a console-based Z-machine interpreter. It is used to play interactive fiction, also known as text adventures, which were implemented either by Infocom or created using the Inform compiler.

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.

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.

ChessX is a chess database. With ChessX you can operate on your collection of chess games in many ways: browse, edit, add, organize, analyze, etc. You can also play games on FICS or against an engine.

The player controls a character (one of three: Good, Bad, and Dead), dodges the missiles (lots of it cover the screen, but the character's hitbox is very small), and shoot at the adversaries that keep appear on the screen.

Learn programming, playing with ants and spider webs ;-) Your robot ant can be programmed in many languages: OCaml, Python, C, C++, Java, Ruby, Lua, JavaScript, Pascal, Perl, Scheme, Vala, Prolog. Experienced programmers may also add their own favorite language.

Barbie Seahorse Adventures is a retro style platform arcade game. You are Barbie the seahorse who travels through the jungle, up to the volcano until you float on bubbles to the moon. On the way to your final destination you will encounter various enemies, servants of the evil overlord who has stolen the galaxy crystal. Avoid getting hit and defeat them with your bubbles!

The GNU backgammon application (also known as "gnubg") can be used for playing, analyzing and teaching the game. It has an advanced evaluation engine based on artificial neural networks suitable for both beginners and advanced players. In addition to a command-line interface, it also features an attractive, 3D representation of the playing board.

This is an open-source port of the Serious Engine from Serious Sam: The First Encounter and Serious Sam: The Second Encounter. To run, you must put your official game data, Levels and Help in ~/.local/share/Serious-Engine/serioussam,serioussamse/gamedata/.

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.

Fifechan is a lightweight cross platform GUI library written in C++ specifically designed for games. It has a built in set of extendable GUI Widgets, and allows users to create more.

vkquake is a modern engine for id software's Quake 1. It includes support for 64 bit CPUs, custom music playback, a new sound driver, some graphical niceities, and numerous bug-fixes and other improvements.

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.

Fork of Julius, an engine for the a city-building real-time strategy game Caesar III. Gameplay enhancements include:

• roadblocks;

• market special orders;

• global labour pool;

• partial warehouse storage;

• increased game limits;

• zoom controls.

The goal of the FlightGear project is to create a sophisticated flight simulator framework for use in research or academic environments, pilot training, as an industry engineering tool, for DIY-ers to pursue their favorite interesting flight simulation idea, and last but certainly not least as a fun, realistic, and challenging desktop flight simulator.

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

Crispy Doom is a friendly fork of Chocolate Doom that provides a higher display resolution, removes the static limits of the Doom engine and offers further optional visual, tactical and physical enhancements while remaining entirely config file, savegame, netplay and demo compatible with the original.

A graphical user interface for the package gnushogi.

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''.

Me and My Shadow is a puzzle/platform game in which you try to reach the exit by solving puzzles. Spikes, moving blocks, fragile blocks and much more stand between you and the exit. Record your moves and let your shadow mimic them to reach blocks you couldn't reach alone.