id Software's John Carmack has revealed that the source code for 2004 horror shooter Doom 3 is ready to be released, and is now waiting for final clearance.
The id co-founder and lead programmer had originally confirmed at QuakeCon earlier this year that the source code for the game would be made available sometime after the release of open-world shooter Rage.
Carmack has now confirmed that the code is about to be released, stating via Twitter, "Doom 3 source is packaged and tested, we are waiting on final lawyer clearance for release."
During the announcement at QuakeCon, the industry veteran also challenged other developers to release their source code for study as well, saying it helps the developer community.
id is well-known for releasing source code for its past games. Last year the company made the source code for Wolfenstein: Enemy Territory and Return To Castle Wolfenstein publicly available.