Medieval Weapons: An Illustrated History of Their Impact ... Kingsley S.A. and Raveh K. 1996. The Ancient Harbour and Anchorage at Dor, Israel: Results of the Underwater Surveys, 1976-1991. Oxford.
It is the first Roman Imperial helmet ever found in the country, and just the second ever found in all of Scandinavia.
Arena shooters are all about fast-paced, frenetic combat, so naturally, weapons play ... it already resembling medieval weaponry, and with it having lore ties to Doom's ancient Sentinel warriors.