Hey guys I"m new to posting on this forum so I'm not sure if I am posting this correctly or not. I've been reading through the forum but not all of it. So I don't know if it has been mentioned before but I was just looking at known easter eggs in the game and one of them mentions a carving in a tree on the first campaign level. Right around where the brute is holding a marine by his neck. It is a heart with M+L and 7-16-95 on it. So I don't know if this helps but it is something that I have found. Sorry if it has been mentioned before.