Posted about this game some time ago, decided to re-post this open source game for updating the links and for the good selections of mods.

TripleA is a free turn based strategy game and board game, similar to Risk, or Axis & Allies. Known for its multiplayer on the online lobby, it also allows Play-By-Email and network (LAN) play, as well as single player vs AI or hotseat. It has over 100 games and maps that can be downloaded from the user community. It is open source, needing only Java 8 to run (can run on Windows, Mac, Linux, etc). Supports savegames, encrypted dice gen, low luck, and other options. Recreate World War 2 with the Axis pushing through to Moscow and Japan devouring the Pacific, or recreate Napoleon‘s march across Europe, or Rome defeating the Carthaginian Empire, or even Sauron conquering Middle Earth, or Zombies taking over America! If you have ever played a boardgame with plastic/virtual pieces around, roll dice, conquer the lands of your enemy, & build new pieces to conquer with, you will be able to jump right into TripleA!

Tags: boardgame, Conquest, japan, java, Middle Earth, mod, Napoleon, open, roman empire, source, strategy, Tiberian Conquest, tiberian sun, triplea, TURN BASED, world war, ww2

GDevelop is a free, open-source game engine. Build from anywhere — even on your phone. Publish everywhere: iOS, Android, Steam, web, gaming platforms.

Tags: GAMEMAKER, Games, gdevelop, html5, open, source

Desktop and Mobile HTML5 Game Framework.

A fast, free and fun open source framework for Canvas and WebGL powered browser games

Tags: BROWSER, editor, GAMEMAKER, hmtl5, Mighty, open, phaser, source

Bad Cop is back. Command a small army of Combine synths and soldiers on a Northern campaign to capture Dr. Judith Mossman. A modification for Half-Life 2.

Tags: code, entropy, FPS, half-life, mod, open, source, zero

To celebrate the Mafia franchise’s 20th anniversary, the original Mafia title will be free on Steam from September 1 through September 5. Also a new Mafia game is in development!

Tags: 20th, ADVENTURE, Anniversary, classic, gangster, mafia, open, RETRO, world

Since 1st April 2021 Open TTD is on Steam!

OpenTTD is a business simulation game in which players earn money by transporting passengers and cargo via road, rail, water, and air. It is an open-source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe.

For windows, linux and mac.

Tags: Deluxe, MAC, open, RETRO, train, transport, ttd, tycoon

RuneScape started in 2001 as a MMORPG browser game written in java. After all this years, with a completely new game engine it’s still around for Windows, Linux, Mac and soon for iOS and Android.

RuneScape is a high fantasy open world MMORPG. Explore an ever changing and evolving living world where new challenges, skills, and quests await. Featuring unprecedented player freedom, you choose how to play, adventure, and grow.

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Tags: fantasy, open, RETRO, RPG, runescape, world

Mindustry is a hybrid tower-defense sandbox factory game. Create elaborate supply chains of conveyor belts to feed ammo into your turrets, produce materials to use for building, and defend your structures from waves of enemies. Features include a map editor, 24 built-in maps, cross-platform multiplayer and large-scale PvP unit battles.

Donationware, Open Source for Windows,MacOS,Linux and Android.

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Tags: defense, MAC, mindustry, open, source, tower

Solarus is a free and open-source Action-RPG game engine, licensed under GPL, and written in C++. It runs quests in Lua, and can work on a great number of platforms. Solarus also features a game editor called Solarus Quest Editor, written in C++ with Qt to help you create your game.

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Tags: engine, GAMEMAKER, LINUX, MAC, open, RPG, solarus, source, zelda

Creativerse is a sandbox adventure game.

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Tags: creativerse, minecraft, MMO, open, sandbox, survival, world