Nexuiz is a fun and free GPL deathmatch shooter. The sci-fi themed shooter is based on the darkplaces engine. Nexuiz adds many more effects and enchancements to the base engine such as bumpmapping,realtime shadows and an advanded new model format. The game has more than a dozen maps and players. It is fully moddable, and thanks to it's quake/darkplaces heritage, there are many basic tutorials already available on the internet. Nexuiz is completely standalone however, and offers modders a solid opensource base to work off of.
After bundling new age technology into products nearly a decade old, you can expect results similar to both Nexuiz and Alien Arena. Welcome to Head To...