I haven't seen anyone else bring this up, but I like the design for, what I think is, the symbol for the Marines on Doomguy's original earth
But the armor kinda looks the Sentinel armor, so i could be wrong idk
@sensible_dude2 It's from when the Slayer was first inducted into the Night Sentinels. Cut concept art for TDA shows the Slayer's classic helmet with bits of Sentinel armor mixed in.
"... For he who comes in our time of need is not of mortal breed, he is the Destroyer, the right hand of our Creator and the one who brings fear where there is no hope." #DOOM