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Lix is an action-puzzle game inspired by Lemmings (DMA Design, 1991) for Windows, Linux, and Mac. It's free and open-source software, placed in the public domain via CC0.

Solve over 700 singleplayer puzzles. Play real-time multiplayer. Design your own levels.

Stendhal is a fun friendly and free multiplayer online adventure game with an old school feel.

Stendhal has a huge and rich world. You can explore cities, forest, mountains, plains and dungeons. You can fight monsters and become a hero.

You will meet a wide variety of characters. Many will give you tasks and quests for valuable experience. You may be asked to help protect land, feed the hungry, heal the sick, make someone happy, solve a puzzle or simply lend a hand.

So what are you waiting for? A whole new world awaits... And if you like, get the source code, and add your own ideas!

A classic, turn-based strategy game with up to four armies fighting against each other. Challenge yourself in a campaign against AI, or a hot-seat battle with a friend. Using the easy map editor you can create any imaginable scenario to play -and share online for others to discover!

https://github.com/P1X-in/Tanks-of-Freedom-3-D

Pixel Wheels is a retro top-down racing game for Linux, macOS, Windows and Android. It features multiple tracks and vehicles as well as various bonuses and weapons to help you get to the finish line first!

• Fixed a variety of issues with unit & block cost multiplier rules
• Fixed many various crashes
• Fixed various Steam achievements not triggering
• Fixed pathfinding not being able to path through solid enemy blocks
• Fixed naval units sometimes attempting to pathfind through land
• Fixed game data not exporting with large saves on iOS
• Fixed water tiles with space background resulting in a black background
• Fixed internal legacy blocks being logic constants
• Fixed power node double-click leading to interaction rate limit triggering
• Fixed units sometimes being unkillable
• Fixed units with long paths sometimes recalculating forever
• Fixed serious issue with player units getting bugged in certain maps with puddles
• Fixed Neoplasia reactor sometimes not exploding
• Fixed units randomly dying when hitting corners
• Fixed piercing bullets permaturely hitting blocks "under" bullets
• Fixed missiles dealing double damage to units
• Fixed FPS not limiting accurately
• Added setting to disable all lighting
• Added logic unit autoPathfind command (default wave pathfinding)
• Made logic unbind command set @unit to null
• Made "any" environment accessible outside of sandbox
• Made payload loaders no longer accept inputs from payload unloaders
• Added logic sensors for shields, content ID (inverse of lookup command)
• Added logic particle effect instruction
• Added logic sync instruction
• Setting factory output points now updates "last accessed"
• Disabled team switching menu in multiplayer outside of sandbox/PvP
• Decreased canvas block silicon cost slightly
• Scathe ammo usage decreased to 15
• Buffed Precept unit

A free/libre and open-source party game that is meant to replicate the feel of games such as Mario Party.

kiki the nano bot is a 3-D puzzle game, basically a mixture of the games Sokoban and Kula-World.

Nexuiz was originally developed by Lee Vermeulen and Ashley Hale (Ladyhavoc), who started Alientrap in the summer of 2002. The goal of the project was to create a high quality first person shooter that could be played freely across all platforms in one package: PC, Mac, and Linux. The engine that powered Nexuiz was Forest Hale’s Darkplaces engine.

The first version of the game was released in 2005. Development continued with many online contributors over the years, with version 2.5 released in October of 2009. Since its release it has been downloaded over 6 million times, and is included with many Linux distributions.

In mid-2010 it was announced that a new XBLA, PSN, and Steam downloadable remake of Nexuiz would be done from the ground up by IllFonic using Crytek’s CryENGINE3 game engine. Original Nexuiz designer Forest ‘LordHavoc’ Hale worked with Illfonic on the new version, many of the GPL contributors forked the project into a new game Xonotic, while Lee Vermeulen moved towards Capsized development. Illfonic’s Nexuiz was released for XBLA in February 2012, and Steam May 3rd 2012.

UltraStar Deluxe is a free open source karaoke game for your PC. The gameplay experience is similar to that of the commercial product SingStar™ by Sony Computer Entertainment, which is exclusively available for the Playstation®.

Unlike SingStar™, however, UltraStar Deluxe allows users to create their own songs and sing them on their PC.

• Utilize over 15 different weapons, including melee, pistols, shotguns, rifles, rocket launchers, crossbows, and miniguns
• Fight thousands of zombies, spiders, bats, skeletons, demons, aliens and more
• Discover rare items and secrets that sprawl across dungeons, woods, caves, cities, desert, hell, and alien worlds
• Customize your character with skill points and over 25 different equipment mods
• Play through the 10 level campaign multiple times for an increase in difficulty and rewards
• Complete eight achievements for an even greater challenge
• Free and open-source software licensed under GPLv3

You are a lone adventurer in a strange world, where geometry does not work in the expected way. Gather as much treasure as you can before the nasty monsters get you. Explore about 50 different worlds, each with its own unique treasures, enemies, and terrain obstacles. Your quest is to find the legendary treasure, the Orbs of Yendor. Collect one of them to win! Or just ignore your quest and collect smaller treasures.

The twist is the unique, unusual geometry of the world: it is one of just few games which takes place on the hyperbolic plane. Witness a grid composed of hexagons and heptagons, straight lines which seem to be parallel, but then they diverge and never cross, triangles whose angles add up to less than 180 degrees, how extremely unlikely is it to reach the same place twice, and how the world seems to be rotated when you do return. All this matters for the gameplay. The game is inspired by the roguelike genre (although in a very minimalist way), works of M. C. Escher, and by puzzle games such as Deadly Rooms of Death.