* In earlier versions of Doom, the player would originally use a rifle as the initial weapon. The player sprites (and subsequently the Zombieman) still use such a weapon in final releases.
* By mistake, the boots of the player during the gibbing death animation are dried in blood, similar to the [[zombies]].
* While all corpses of marines in [[E1M1: Hangar (Doom)]] are green, it appears that the
marines actually wear a variety of colors, as seen with other players in multiplayer or [[former human|former humans]].
== Player characters ==