First lets talk speed. According to my calculations (Doomguy’s maximum run speed is 819.52 map units/second) and extrapolating those units out (based on his height in terms of map units) by his speed of movement we can safely assume the Doomguy can run somewhere around 57 MPH without tiring(148% as fast as Usain Bolt’s world record 100 meter dash) – this will prove advantageous in closing the gap on Gordon in any head to head confrontation. In physical strength the Doomguy is capable of canonically punching a Hell’s Baron “a few feet back” – according to the Doom Manual the average Hell’s Baron weighs “as much as pickup truck” – this is more than enough physical force to defeat Gordon even equipped with the HEV suit and trademark crowbar. In terms of weaponry the BFGD9000 alone outclasses Gordon’s entire arsenal by a significant margin in both fire rate and damage output. Consider that Gordon frequently is terrorized by Headcrabs that hardly measure up to even the average hellspawn regularly defeated by Doomguy. Finally, when you add the fact that Doomguy has never had to reload in his entire life, is capable of defying physics and double jumping, and has no fear of fall damage, the end result of their confrontation being Gordon’s defeat is undeniable.