Nexuiz is a first-person shooter by Alientrap Software. It is a free game: source code is free software and data is free content. It is distributed under the GNU General Public License (GPL). Version 1.0 was released on May 31, 2005. The current version, 2.5.2, was released on October 1, 2009. Nexuiz uses DarkPlaces, a significantly modified Quake engine. The logo is based on the Chinese character "力" (Li), meaning strength.