As part of this weekend's QuakeCon festivities, id Software has released GPL-licensed source code for two titles it previously co-developed: Splash Damage's Wolfenstein: Enemy Territory and Gray Matter's Return To Castle Wolfenstein.
Currently, the RtCW code can be downloaded from the Id software FTP site in single and multiplayer versions, alongside the full source code for the single and multi-player Wolfenstein: Enemy Territory. All three of the source code releases are licensed under version 3 of the GNU General Public License, according to a report on consumer weblog Shacknews.
John Carmack, id Software's co-founder, had promised that the code for RtCW and Wolfenstein: Enemy Territory -- which were released in 2001 and 2003 respectively -- would be available shortly after QuakeCon 2009.
But Carmack indicated during his keynote address at QuakeCon that a busy schedule had prevented him from working through the legalities of making them available any sooner.
Carmack also teased during his speech that after Rage ships, id will look at making the Doom 3 source code available as well.
id Software has made plenty of announcements at this year's annual QuakeCon in association with new owner Bethesda, such as the announcement that Rage is coming to the iPhone and iPad before the PC version releases next year.