Platinum Arts Sandbox is a game design tool that allows users to quickly and easily create their own worlds, even cooperatively. It is free, open source, and easy to use. In addition it has even been used, and very well received, at Mildred Elley College during the summer Kids Camp in a course on how to create modifications.

Platinum Arts Sandbox Free 3D Game Creator has released a gameplay trailer showcasing gamemodes and features. Additionally is a video of kids experiencing Sandbox.

Based upon the Cube engine, AssaultCube is a fast paced, first-person shooter, (partially) open source, cross platform game. Formerly called ActionCube, this game can be played both online with hundreds of other players from around the world or in a single player mode.

Game Editor is the open source game design software that gives you the power to create the games of your dreams, and, unlike other game creation tools, gives you the chance to get and change the source code of the game creator and design and develop 2D games for personal computers as well as mobile devices.

Kris Occhipinti is currently in the middle of creating a 2D game created using the Blender 3D game engine. The game, called Pissed Off Penguins, looks similar to the popular “Angry Birds” game most of you have likely heard about. I wanted to outline this open-source project and expose some of the unique techniques Kris is using to both fund this project and create the game itself.

Yesterday I reviewed AssaultCube, a realistic shooter game based upon the Cube engine, so today it’s time to have a look at Sauerbraten, another game in the series of games based on this engine. The version which I’m going to talk about is the latest available at the moment, “Justice Edition”.

While there are many open-source games available (just see the recent discussion about the most advanced GPL-ed FPS), most of them are based upon the ioquake3 game engine that in turn is based upon id Software's open-source id Tech 3 engine. There's also games like Nexuiz that use the DarkPlaces engine and then also Warsow that uses QFusion.

Great free FPS game. It has in game level editor. Single player and multiplayer game play is available. Nice action and graphics.

Gregory Ray, lead organizer of LivingArcana.com announced today that he has hired the Brazilian programmer, Gutemberg Ribeiro, of “Conceptus” an open source game engine, to port his engine over to Apple’s iPhone platform. The port of the game engine will remain open source and will be available under LGPL license to allow true 3D game development on the iPhone.