Nightmare Armor was an online group who built accurate replicas of armor from video games, including the MJOLNIR. Their talents were spoken of by popular Halo fan sites, such as Halo.Bungie.Org. Rooster Teeth mentioned them in the audio commentary of Red vs Blue season two, referring to fans wearing red and blue Nightmare Armor suits. G4 has shown them on their shows Pulse, Screensavers, Attack of the Show, and on various E3 promotional spots.
Their relations with Halo.Bungie.Org were strained when Sid Garrand threatened legal action against them for posting pictures he had sent to them in an e-mail in July 2005. Microsoft, however, effectively shut them down serving them with three different cease and desist orders for copyright infringement. However, Bungie was appreciative of their promotion and dedication, as they give them a mention in the special thanks section of the credits in Halo 2.