Its successor ports GZDoom and QZDoom are now maintained by Christoph Oelckers, Alexey Lysiuk, Magnus Norddahl, Rachael Alexanderson, and Braden Obrzut.

ZDoom was originally created by Randi Heit using id Software's and various others' sources. GZDoom and its descendants from version 3.0.0 on are licensed GPL and are subject to the terms and restrictions of the new license. No profit may be made from the sale of it. Older ZDoom ports may be used and distributed free of charge. It runs on Windows, Linux, and OS X, and adds new features not found in the games as originally published by id Software. ZDoom is a family of enhanced ports of the Doom engine for running on modern operating systems. For older systems you may want to try LZDoom. (Vulkan/OpenGL 4.5 capability recommended, but the minimum requirement for the hardware renderer is OpenGL 3.3, the minimum for the software renderer is Direct3D 9), but is the same game. This new port targets current systems with modern graphics hardware.

Windows version of doom 2 free download