I hate to burst your bubble but there are Honour Guard Bruted on Halo 2. I cant remember the name of the level but its the one where you go into a room and the HG Brutes storm in. you can go under the level and filter them in to kill them
Yes I know I was actually playing that level and thats what made me think about it and start this thread. I was wondering why that is the only time you see them. Although the Chieftains would be the spiritual successors of the Honor Guards I suppose EDIT: Also, what happened to the red plasma rifles? I guess they were replaced by Spikers?