Don't forget too add me on the list... I'm so happy I pre-ordered Halo Wars Limited Edition. lol. <3 <3 <3 <3 <3 COMMANDERMATT1
I gots them now. I got the assembly skull on my own, but the other two I had to YouTube. I'll give you a not-too-helpful clue: Spoiler You can only really get them in forge; they're all in areas outside of a player's reach