

He stated his reasons as having no time to work on it, and that he was frustrated by numerous complaints about the port's lack of compatibility with ATI video cards. On April 14 2010, Graf Zahl announced on the Doomworld forums that development of GZDoom had halted. An official release of ZDoom was made on February 14, 2008, and version 1.1.0 of GZDoom was released shortly afterward incorporating the changes from that version.

On January 19, 2008, development of the port was put on hold until another official release of ZDoom is made, due to highly extensive changes to the ZDoom renderer (which consequently require extensively changing the OpenGL rendering code for compatibility) coming more frequently than Graf Zahl could catch up. Its development was halted on April 14, 2010, except for updates to keep its codebase in sync with ZDoom. It was first released on the 30th August 2005 and runs in Linux and Windows. 4.6.1 GZDoom is a ZDoom-based port which is maintained by Christoph Oelckers (Graf Zahl).
