Doomsday HQ
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The Doomsday Engine is an enhanced Doom source port for the Windows, Mac OS X, and Linux platforms. It is based on the source code of id Software’s Doom and Raven Software’s Heretic and Hexen. The Doomsday Engine and the associated ports of Doom, Heretic and Hexen have been under development since 1999. The first versions were released in late 1999 and early 2000. Most of the development work has been done by Jaakko Ker
