Gameplay 1.2, a cross-platform, C++ game framework designed for learning and writing mobile and desktop games, has been released. Gameplay is an open source project hosted on Github and developed by Sean Paul and Steve Grenier, both graphics and game developers at Research In Motion, maker of the BlackBerry® smartphone and PlayBook tablet computer.

Nexuiz is a 3d first person shooter (FPS) done in the old Quake 1 style of gameplay where graphics weren't as important as was the raw fun of pure deathmatch play. That form of gameplay has been lost in many ways in the newer games of today with their greater concentration on graphics and less on gameplay.

Assault Cube is an open source 3d shooter done in the old school deathmatch style of gameplay, but with much newer graphics. Gameplay is especially good in this game due to the way it's implemented.

My favorite PC game of all time was Interstate '76. It was really unique in its gameplay and has the best soundtrack for a game ever, featuring 70's funk, where I would pop in the cd on my computer just to play the music. I've never done that with any other game, before that or since (the site has archived the soundtrack and you can download the mp3 files from there).

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

FF has a precise objective: to bring the classic gameplay to the maximum. We’ve found D3 gameplay good, but it was too slow and static if compared to older id games.

Globulation 2 is a RTS game with an unusual gameplay design. The source and media are licensed under the GPL.[1][2] The latest release of the game is 0.9.4.1 released on March 25th, 2009. It is programmed in C++. It uses the SDL[3] and Boost[4] libraries.

Alien Arena 2007 is a free/open-source first-person shooter game based on source code released by id Software. Started by COR Entertainment in 2004, the game combines a 1950s-era sci-fi atmosphere with gameplay similar to the Quake, Doom, and Unreal Tournament series. Alien Arena is primarily an online multiplayer action game, although single player campaigns are also available against bots.

Rhomobile has released version 1.4 of its open source Ruby-based framework that allows developers to create platform independent applications for a number of smartphone operating systems