Most of the game media is licensed under the CC BY-SA 2.5 Creative Commons license. Its initial standalone version 1.0.0 was released on August 11, 2005. With the stable version 1.1.0 released on March 31, 2006 the game change its game engine to ioquake3, a modified id Tech 3 engine. In 2008, Tony J. White of the ETPub mod for , contributed an administrative system and a backported client that were soon incorporated into the official Subversion repository. The latest public build version on the icculus repository is 1.2 beta "Gameplay Preview" (aka GPP), released on December 4, 2009 with the latest updates released on November 8, 2011. A Tremulous continuation from Dark Legion has its source code repository migrated to GitHub and is not under active development (last commit June 2016). Unvanquished is a "Tremulous"-based FPS with another engine (Daemon), which was first released publicly in 2012 and is under active development. It includes many original maps and is able to run Tremulous maps with some distributed in a community pack. Some Unvanquished official maps were community maps for Tremulous. Murnatan, currently in development by the Czech development team, AAA Games. The game is based on a "Tremulous" server modification which was worked on by the same lead developer of AAA Games, but due to licensing problems, has had some changes away from its previous title "Tremulous 2" and concept work, many of which was already completed. The title was approved for Steam Greenlight within 7 days. Joe Barr of NewsForge called "Tremulous" his favorite free software FPS game. "Tremulous" was voted "Player's Choice Standalone Game of the Year" in Mod Database's "Mod of the Year" 2006 competition. "Tremulous" later came in first in a "Best free game based on GPL Quake source?" poll on the Planet Quake website. At the beginning of 2007, "Tremulous" also took first place in the Mod Database "Mod of the Year" 2006 competition under the category of "Player's Choice Standalone Game of the Year" as well as honorable mentions in "Genre Award: Action" and "Editor's Choice Standalone Game of the Year". Tremulous was also mentioned in Games for Windows (formerly Computer Gaming World): 101 Free Games Issue for 2007. "Tremulous" was selected in March 2010 as "HotPick" by Linux Format.