0 A.D. is a real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of thirteen ancient civilizations, each depicted at their peak of economic growth and military prowess.The thirteen factions are: Three of the Hellenic States (Athens, Sparta and Macedonia), two of the kingdoms of Alexander the Great's successors (Seleucids and Ptolemaic Egyptians), two Celtic tribes (Britons and Gauls), the Romans, the Persians, the Iberians, the Carthaginians, the Mauryas and the Kushites. Each civilization is complete with substantially unique artwork, technologies and civilization bonuses.

0 A.D.

Real-Time Strategy Game of Ancient Warfare

Shattered Pixel Dungeon is a Roguelike RPG, with pixel art graphics and lots of variety and replayability. Every game is unique, with four different playable characters, randomized levels and enemies, and over 150 items to collect and use. The game is simple to get into, but has lots of depth. Strategy is required if you want to win!This game is based on the freely available source code of Pixel Dungeon. It began as a project to improve on the original game's quirks, but has since evolved into a separate game, with many unique features.Shattered Pixel Dungeon includes:High replayability: Randomly generated levels, enemies, and items. No two games are the same!4 hero classes: Warrior, Mage, Rogue, and Huntress. Each hero has a unique playstyle.8 subclasses: Successful heroes can refine their skills to become more powerful.5 distinct dungeon regions: each with their own enemies, traps, and quests.Over 150 different items: including powerful wands, rings, weapons, and armor.50+ different enemies, 30 different traps, and 5 bosses to test your skills.Unique artifacts, which grow in power as you use them.Updates, with new content roughly once a month.Shattered Pixel Dungeon is a 100% free game. There are no advertisements, microtransactions, or paywalls. An optional donation to support the game unlocks a couple of fun extras, but these are entirely cosmetic and do not affect gameplay.Find an issue with the game? Have a suggestion? Then contact me! This game is a solo project, so the feedback of players is invaluable in improving the game. You can contact me at Evan@ShatteredPixel.com (My ability to respond to emails in languages other than English is limited.)Shattered Pixel Dungeon is available in multiple languages thanks to support from the community. The translation project is hosted here: https://www.transifex.com/shattered-pixel/shattered-pixel-dungeonShattered Pixel Dungeon is open source software under the GPLv3 Licence. You can find the current source code here: https://github.com/00-Evan/shattered-pixel-dungeon

Shattered Pixel Dungeon

Roguelike RPG, with pixel art graphics and lots of variety and replayability


      OpenRA is a project that recreates and modernizes the classic Command &amp; Conquer real time strategy games. We have developed a flexible open source game engine (the OpenRA engine) that provides a common platform for rebuilding and reimagining classic 2D and 2.5D RTS games (the OpenRA mods).
    
      
      The OpenRA mods include new features and gameplay improvements that bring them into the modern era:
    
      
        A choice between “right click” and classic “left click” control schemes
        Overhauled sidebar interfaces for managing production
        Support for game replays and an observer interface designed for streaming games online
        The “fog of war” that obscures the battlefield outside your units' line of sight
        Civilian structures that can be captured to provide benefits
        Units gain experience as they fight and improve when they earn new ranks
      
      
      OpenRA is 100% free, and comes bundled with three distinct mods. When you run a mod for the first time the game can automatically download the original game assets, or you can use the original game disks.
    
    

OpenRA

Reimagining of early Westwood real-time strategy games


      Build up a great army, gradually turning raw recruits into hardened
      veterans.
      In later games, recall your toughest warriors and form a deadly host that
      no one can stand against! Choose units from a large pool of specialists,
      and hand-pick a force with the right strengths to fight well on different
      terrains against all manner of opposition.
    
      
      Wesnoth has many different sagas waiting to be played.
      Fight to regain the throne of Wesnoth, of which you are the legitimate
      heir... lead a brutal quest to unite the orcish tribes... vanquish a horde
      of undead warriors... Guide a band of elvish survivors in an epic quest to
      find a new home...
    
      
      There are at least two hundred unit types, sixteen races, six major
      factions, and hundreds of years of history.
      The world of Wesnoth is absolutely huge and only limited by your
      creativity.
      You can also challenge up to eight friends — or strangers — and fight in
      epic multiplayer fantasy battles.
    
    

Battle for Wesnoth

A turn-based strategy game with a high fantasy theme

The classic 3D real-time strategy game from 1999 has been updated, upgraded, and modernized for the very latest platforms!Command the forces of The Project in a battle to rebuild the world after mankind has been nearly destroyed by nuclear missiles.Warzone 2100 offers a story-driven single-player campaign, online 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.Highlights:Remastered single-player campaign with expanding persistent bases, away missions, and moreOnline multiplayer with up to 10 players, free-for-all or team-play, for massive battlesLocal skirmish with AI bots, for endless replayabilityExtensive tech tree with over 400 different technologiesCustomizable units with a flexible design system that enables a wide variety of possible tacticsCross-platform multiplayerSupport for multiple graphics backends (OpenGL, OpenGL ES, Vulkan)100% free and open source

Warzone 2100

Command the forces of The Project in a battle to rebuild the world.

A reimplementation of the most famous civilization-building game ever—fast, small, no ads, free forever!
      Build your civilization, research technologies, expand your cities and defeat your foes!
      The world awaits! Will you build your civilization into an empire that will stand the test of time?
    

Unciv


   Hedgewars is a turn-based strategy, artillery, action and comedy game, featuring the antics of pink hedgehogs with attitude as they battle from the depths of hell to the depths of space.
  
      
    As commander, it's your job to assemble your crack team of hedgehog soldiers and bring the war to your enemy.
  
      Game features:
      
        Hilarious and strategic turn based combat for up to 8 players
        Singleplayer mode with two campaigns and many scenarios and challenges
        Both local and network multiplayer, with optional AI opponents
        Battle on an infinite number of randomly generated maps, with over 22 environments
        Attack with one of over 38 devastating weapons!
        Including the piano strike and explosive robotic cake
        Utilise over 16 utilities like the rope or portable portal device to pave your path to victory
        Play the game your way, with many different game modifiers, tweak almost every aspect of the match
        Customize your team, with numerous hats, costumes, graves, forts, flags and unique voice packs
        Huge battles with up to 64 hedgehogs
        Play both singleplayer and multiplayer minigames
        Plugin your own custom maps, costumes, and other artwork
      
    

Hedgewars

Funny turn-based artillery game, featuring fighting Hedgehogs!

Lead one of three interplanetary houses, Atreides, Harkonnen or Ordos, in an attempt to harvest the largest amount of spice from the sand dunes. Exchange your spice stockpiles for credits through refinement and build an army capable of thwarting attempts of the other houses to stop your harvesting!Dune Legacy is an effort by a handful of developers to revitalize the first-ever real-time strategy game. The original game was the basis for the hugely successful Command and Conquer series, and the gameplay has been replicated an extended to a wide variety of storylines and series.NOTE: Original Dune 2 game files are needed.

Dune Legacy


      You are the regent of a small clan. Your task is to build an ever growing settlement. Every member of your clan will do his or her part to produce more resources to further this growth.
    
      
      Widelands offers a single-player mode with campaigns that tell stories of the tribes and their struggle in the Widelands universe. However, settling really starts when you unite with friends over the Internet or LAN to build up new empires together – or to crush each other in the dusts of war. Widelands also offers an artificial intelligence to challenge you.
    
    

Widelands


            Freeciv is a Free and Open Source empire-building strategy game inspired by the history of human civilization. The game commences in prehistory and your
            mission is to lead your tribe from the Stone Age to the Space Age...
        
      
            This client for connecting to network games, or to launch local single-player games, is based on gtk3 widget set.
        
    

Freeciv gtk+-3.22 client

Gtk+-3.22 based client for the Freeciv game

KMines is a classic Minesweeper game. The idea is to uncover all the squares without blowing up any mines. When a mine is blown up, the game is over.
    

KMines


      Experience the thrill of medieval castle building and destruction in our
      isometric, open source strategy game - a modern remake of Firefly Studios'
      classic Stronghold. Immerse yourself in a world of strategy and tactical
      decision making as you design and defend your own castles in medieval Europe.
    
    

Stone Kingdoms

This open source multiplatform project, written from scratch, is designed to reproduce the original game with significant improvements to the gameplay, graphics and logic (including support for high-resolution graphics, improved AI, numerous fixes and UI improvements), breathing new life into one of the most addictive turn-based strategy games.
    

fheroes2

fheroes2 is a recreation of the Heroes of Might and Magic II game engine

SCID (Shane's Chess Information Database) is a chess database application that allows users to store, organize, and search through large collections of chess games. It also includes chess engines for playing against the computer and analyzing positions. Any Xboard or UCI compatible engine is supported.SCID displays graphical trends and produces printable reports on players and openings. Using Scid you can also play online on FICS, and even study endings with endgame tablebases.Engines included in the package:StockfishLeela Chess Zero

SCID

The FreeCol team aims to create an Open Source version of Colonization (released under the GPL). At first we'll try to make an exact clone of Colonization. The visuals will be brought up to date with more recent standards but will remain clean, simple and functional. Certain new 'features' will be implemented but the gameplay and the rules will be exactly the same as the original game. Examples of modern features are: an isometric map and multiplayer support.This clone will be developed incrementally and result in FreeCol 1.0.0 which will be an almost exact Colonization clone. Incremental development basically means that we'll add features one at a time. This allows us to have a running program at all times and also to release an unfinished but working game once in a while.Once FreeCol 1.0.0 is finished we'll start working towards FreeCol 2.0.0. FreeCol 2 will go beyond the original Colonization and will have many new features, it will be an implementation of our (and our users') image of what Colonization 2 would have been.

FreeCol

VCMI is an open-source engine for Heroes of Might and Magic III with new possibilities. Years of intensive work resulted in an impressive amount of features. Among the current features are:Complete gameplay mechanicsAlmost all objects, abilities, spells and other contentBasic battle AI and adventure AIMany GUI improvements: high resolutions, stack queue, creature windowAdvanced and easy mod support - add new towns, creatures, heroes, artifacts and spells without limits or conflictsLauncher for easy configuration - download mods from our server and install them immediately!Random map generator that supports objects added by modsNote: In order to play the game using VCMI you need to own data files for Heroes of Might and Magic III: The Shadow of Death.If you want help, please check our forum, bug tracker or GitHub page.

VCMI

Open-source game engine for Heroes of Might and Magic III

Colobot (Colonize with Bots) is an educational game aiming to teach programming through entertainment. You are playing as an astronaut on a journey with robot helpers to find a planet for colonization. It features 3D real-time graphics and a C++ and Java-like, object-oriented language, CBOT, which can be used to program the robots available in the game.

Colobot

The ever popular kitty-that-follows-your-mouse-pointer toy.Neko is Japanese for cat. According to Wikipedia it was originally written for the NEC PC-9801.

oneko

kitty that follows your mouse pointer toy on desktop

Freeciv21 is a free open source turn-based empire-building 4x strategy game, in which each player becomes the leader of a civilization. You compete against several opponents to build cities and use them to support a military and an economy. Players strive to complete an empire that survives all encounters with its neighbors to emerge victorious. Play begins at the dawn of history in 4,000 BCE.
      Freeciv21 takes its roots in the well-known FOSS game Freeciv and extends it for more fun, with a revived focus on competitive multiplayer environments. Players can choose from over 500 nations and can play against the computer or other people in an active online community.
      The code is maintained by the team over at Longturn.net and is based on the QT framework. The game supports both hex and square tiles and is easily modified to create custom rules.
    

Freeciv21

You're playing against the AI in a chess match. The AI has vast computational resources, but you have hacks. Use your hacks to win!

Chess Comp Stomp with Hacks


      Naval Battle is a ship sinking game. Ships are placed on a board which
      represents the sea. Players try to hit each others ships in turns without knowing
      where they are placed. The first player to destroy all ships wins the game.
    
    

Naval Battle

FreeOrion is a free, Open Source, turn-based space empire and galactic conquest computer game.
      FreeOrion is inspired by the tradition of the Master of Orion games, but does not try to be a clone or remake of that series or any other game. It builds on the classic 4X (eXplore, eXpand, eXploit and eXterminate) model.
    

FreeOrion

Turn-based space empire and galactic conquest game

Backgammony is a free backgammon frontend for linux. It provides a user interface around Gnu Backgammon's AI as well as trustless Internet and LAN games.

Backgammony

A backgammon frontend with multiplayer support

Unvanquished is a real-time strategy game played as a first-person shooter where evolving aliens and heavily armed humans fight for their survival.

Become a marine, handle your big weapon and dress that impressive exoskeleton to save the human race like a boss. Or if you prefer, be a monstrous beast and save those cute grangers from those two-legged invaders who only know how to turn beautiful organic equilibrium into lifeless machines and dead concreted worlds.

Unvanquished

FreeRCT aims to be a free and open source game which captures the look, feel and gameplay of the popular games RollerCoaster Tycoon 1 and 2.The game is still in an early alpha state, but it is already playable and offers a variety of features.

FreeRCT

Unknown Horizons is a 2D real-time strategy simulation with an emphasis on economy and city building. Expand your small settlement to a strong and wealthy colony, collect taxes and supply your inhabitants with valuable goods. Increase your power with a well balanced economy and with strategic trade and diplomacy.

Unknown Horizons

Open Source Real-Time Economy Simulation Game

In 1993 a game called Hard Vacuum was in development. Heavily inspired by Dune 2, the father of the modern RTS, it had ambitious goals, but it was never released to the public. Decades later the pixel art was released under a free license. The starting point for this project.OpenHV is an Open Source Pixelart Science-Fiction Real Time Strategy game from the golden era of RTS. It comes with Multiplayer (LAN and internet) support, competent skirmish AI as well as an integrated map editor. All the assets are licensed under Open Source compliant terms. It is easy to mod.

OpenHV

Open Source 90s Pixelart Sci-Fi Real Time Strategy game


      Tremulous is a free, open source game that blends a team based FPS with
      elements of an RTS.
    
      
      Players can choose from 2 unique races, aliens and humans.
      Players on both teams are able to build working structures in-game like an
      RTS.
    
    

Tremulous

Aliens vs Humans, First Person Shooter game with elements of Real Time Strategy


      KsirK is a computerized version of the well known strategic board game Risk.
      The goal of the game is simply to conquer the world by attacking your neighbors with your armies.
    
      Features:
      
        Support for 1-6 human or computer (AI) players
        Multi-player gaming over a network
        You can easily create new skins with SVG graphics and the skin editor
        Hot New Stuff support. You can easily download and install new skins
      
    

KsirK

JSettlers is an open source remake of the game The Settlers III by BlueByte. The main goal of the game is to build an economy and fight other players.JSettlers needs the graphics files from an original Settlers III installation. The demo version work as well but only contains Roman and Amazon graphics files.

JSettlers

A Remake of "The Settlers III" for Windows, Linux, Mac and Android

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