Doom is a popular first-person shooter developed by ID Software in 1993. In this game, you take the role of a space marine, who is sent to Mars to investigate secret experiments that have been done by the Union Aerospace Corporation (UAC). Doom was soon ported to various systems including Linux, Amiga, Mac OS, Playstation, SNES, Nintendo 64 and others. Ya, I know my gameplay video of Doom isn't the greatest :P, but hey, at least I picked a mid range difficulty and got 100%. :P I'm simply not experienced with FPS's, if I ever do a walkthrough of this game, you can be sure that I would have practiced. :P (*cough*strafing*cough*)
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