NERF Arena Blast!

OpenArena is a community-produced deathmatch FPS based on GPL idTech3 technology. There are many game types supported including Free For All, Capture The Flag, Domination, Overload, Harvester, and more. There are 17 unique player models to choose from and 12 weapons.

ROBLOX is an online virtual playground and workshop - where kids of all ages can safely interact, create, have fun, and learn.

OpenSpades is an open source OpenGL-based alternative game client by yvt that can be used to play on all AoS 0.75 and AoS 0.76 servers listed on BuildAndShoot.com. It's compatible with PySnip/pyspades and runs on Windows, Mac, and Linux.

Blockland is a non-linear sandbox game with no set goals, giving players the freedom to design and construct elaborate structures. Styled as a tiny minifigure, players build inside of the virtual world using bricks reminiscent of toy blocks. These structures can be built in either a single-player or multiplayer (either online or through a local area network) setting.

Digital Paint: Paintball 2 is a Paintball game that started out as a mod for quake 2 but then took on a life of its own as an open source fps game with a global player and clan management system.

Infiniminer is a multiplayer block mining game with several different player classes to choose from.The object of the game is to collect loot while trying to keep the other team from accumulating loot.

SAY HELLO TO THE CREATIVE SHOOTER. CREATE YOUR BATTLEGROUND, DESTROY IT, THEN CREATE IT AGAIN. IT'S CONSTRUCTION, COMBAT AND CREATIVITY.

This sandbox fun-shooter allows players to create worlds and maps that they’ve always dreamed of, brick by brick. They can share these virtual playgrounds with the community and use them as the backdrop for fast-paced shooter hunts against fellow players or computerized opponents. This comic style online game is built on the ‘Unity 3D’ engine and will be playable directly in a web browser. The ‘sandbox’ mode, in which players use simple building blocks to construct complex environments, can be played on social networks and mobile devices such as smartphones and tablets. Brick-Force is being developed by Korean game developer EXE Games as a co-production with Infernum. Beta and launch of the free-to-play title in Europe and North America are planned for spring 2012. »

First Person Shooter! Dynamic cubic world where you can build and destroy things and ones. Modern, real prototype of weapons and other liquidating your different-colored enemies will vary your in-game possibilities. A lots of cool game-modes, where you can shoot, destroy, build your own map, be the last-man-standing against zombies in Zombie-Mode, or to arrange a massive tank battle in Tanks Mode. Every one can find stuff he addicted to in this game. Huge amount of maps, made by developers themselves and of course by community. Upgrade your weapon, your looking, and looking of your equipment, increase your in-game level, involve yourself in the game's worldwide ranking system with another players. Some of game-modes include up to 4 team at the same battle field. Clan tournaments where you gather with other clans to reach 1 goal - be a champion. »

tOpenSpadongs (or tspd) is a client for the beta version of the game Ace of Spades. It's forked from yvt's OpenSpades. It tries to focus on smooth, enjoyable competitive gameplay above all else.