it can run in Classic under Mac OS X on Power Macs, Panther and Tiger cause graphic artifacts due to the later version of Classic having a double-buffered screen. It can also be played under emulation on Intel and Apple silicon Macs with SheepShaver and QEMU. In addition to an adjustable viewport, it supports rendering at low or high resolutions, and allows network play over AppleTalk as well as IPX. Linux Doom was ported to Linux by id Software programmer Dave Taylor in 1994. The last Linux Doom binaries were provided by id Software on October 13, 1996, through the company's ftp-server. The source code to the Linux version of Doom was released by id Software on December 23, 1997, under a non-profit End user license agreement; it was re-released on October 3, 1999, under the terms of the GPL-2.0-or-later license. However, the source codes to the DOS and Windows versions of the game were not released, due to copyright issues concerning the sound library used by original DOS version and id Software having no access to the source code of the Windows port. Microsoft Windows The first version of Doom for Windows was released under the name Doom 95, on August 20, 1996. It was compatible with Windows 95 and up, and was able to use WADs from the DOS versions. It also allowed users to set up multiplayer games much easier than in DOS. It was included with Final Doom. The port was project-led by Gabe Newell and other later founders of Valve. On September 26, 2001, Doom Collector's Edition was released, containing The Ultimate Doom, Doom II, and Final Doom. It was re-released on January 1, 2004 with added preview content for Doom 3. Some early versions of Doom 3 included the Collector's Edition and a small demon figurine as a bonus. The BFG Edition of Doom 3, released on October 15, 2012, includes The Ultimate Doom as well as Doom II. On August 3, 2007, The Ultimate Doom, Doom II, and Final Doom were released on Steam. This release runs the original DOS versions of the game using DOSBox, a DOS emulator. Acorn RISC OS AcornDoom was released for the Acorn Archimedes by R-Comp Interactive on February 7, 1998. It was made available in a bundle of three Doom games: The Ultimate Doom, Doom II, and Master Levels for Doom II, as well as the Maximum