DOOM centers around the adventures of an unnamed marine (generally referred to as "Doomguy") who roams the planet Mars, killing demons as he goes. The story, while serviceable, is reasonably kept to a minimum. (although it has seen a massive overhaul in newer installments within the franchise) Doomguy's motives often vary from game to game; for instance, his initial arrival on the demon-infested Mars was his punishment for disobeying a superior officer, while later on, his attempts to fight the forces of Hell stem from the death of his pet rabbit...
You heard me.
Power Of The Verse
DOOM's verse is a moderately powerful one both in terms of individual abilities and readily accessible technology, with both the strongest enemies and the most powerful items peaking at Town level due to scaling from the BFG9000.
Doomguy himself has two versions; the original Doomguy incarnations from DOOM, DOOM II and DOOM 64, and the Doom Slayer incarnation from the 2016 game. The latter version is notable due to both the Glory Kills and the in-game lore placing his physical stats above every other entity in the franchise, with the only possible exceptions to this being The Seraphim (who is said to have been the one responsible for giving the Doom Slayer his powers) and The Titan. (which the Doom Slayer is stated to have fought and killed centuries before the events of the 2016 game)
In regards to speed, all versions of the Doomguy can effortlessly outrun rockets which generally hang around 660 MPH, and many of the demons also scale to this due being capable of keeping up with the main characters. The protagonists also possess High Hypersonic combat speed and reactions via reacting to plasma projectiles comparable to solar winds.
Guardian of Hell
Gore Nest (?)
Heavy Weapon Dude
Security Guard Zombie
Mark V Pistol
Heavy Assault Rifle