After finishing Halo 3 the initial time on Heroic by myself, I set about searching for skulls. Initially I found the Blind, Tilt and Mythic skulls on my first run through, but i wanted to do a real search. So far I've found 5 gold skulls and Blind, all by myself. Before finding those last 3, though, i decided to try out the campaign scoring. I put on Tilt and Mythic (the only two gold ones i had at the time) and got my 5 year old half-brother to play as Arbiter/Bullet Magnet. I knew that Mythic gave all the enemies heaps of Health, but i had no idea what Tilt did. Anyways, i got the scoring achievements for the first three levels, which involved a lot of profanities towards phantoms with Chopper-resistant guns and me yelling "WHY ARE YOU NOT DYING???" It was fun. Eventually my half-bro started catching onto my plan and started letting me go into the fight alone while he'd hang back. That became quite useful as It allowed me to use him as a respawn station while i went about chipping away at the brute resistance. I found the terminals with the assistance of the Halo 3 Guide, but I want to find the skulls myself.