Or is it like classic halo 2 and 3 where you have to find them before you unlock the effect?
You need to find them before you can use them in the game.
AWESOME! I never liked them just being unlocked from the get go. That’s exciting!
> 2533274862181038;2:
> You need to find them before you can use them in the game.
Sweet, that makes me really happy about it when I run through it with a friend later this week for the first time
I’m playing campaign straight not wasting too much time, just kinda moving forward, exploring a little then forward again, finding some intels. I’m planning on playing campaign again to find the remaining intels and the skulls 
> 2535442775540159;5:
> I’m playing campaign straight not wasting too much time, just kinda moving forward, exploring a little then forward again, finding some intels. I’m planning on playing campaign again to find the remaining intels and the skulls 
This is what I do as well, I like to explore but I always go back for anything I missed later. Was very glad when I heard they were bringing back hidden skulls though, its so much fun to find them, especially when you weren’t really looking!