Originally Posted by JDR13 
I took a break for a few days but came back to this yesterday and took out the third alien ruler. I was looking at the Steam achievements afterwards and was surprised to see that only 17% of players have managed to defeat all three rulers in 1 playthrough.
Rest assured that I am among them
Originally Posted by JDR13
I made the armors from the Viper King and Berserker Queen corpses. They're kind of silly looking, but the added abilites are pretty fun. I had a Ranger in the Viper suit freeze the Archon ruler before delivering the coup de grâce.
The Archon Ruler's armor is, by far, the prettiest of them all.