Having read the latest inside infinite and seen some of the screen shots I see 343i have included more collectables than just skulls and terminals.
And I must say I’m super stoked for this, I love collectables and exploring maps looking for cool stuff, my only problem is my OCD for collectables will kick in and I won’t leave an area until I’m 100% complete, this means I might be playing campaign for a while.
What I am hoping for is there will be some sort of armour customisation made available in multiplayer if you collect everything in campaign.
I’m in the same boat. As soon as I saw the collectibles during the campaign overview I was like, “oh no I’m going to take months to complete this game aren’t I?” I might try to hold off on getting all the collectibles until my second playthrough, but I guess that’ll mostly depend on how compelling the story is and how fun finding collectibles is.
I am 99% sure that getting the collectibles in the campaign will give us prizes for multiplayer.
“Where is that last IFF tag?! It has to be around here somewhere! I don’t care if there’s still 15 hours of content still unexplored! I NEED THIS IFF TAG COLLECTABLE!” totally not me 
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> I’m in the same boat. As soon as I saw the collectibles during the campaign overview I was like, “oh no I’m going to take months to complete this game aren’t I?” I might try to hold off on getting all the collectibles until my second playthrough, but I guess that’ll mostly depend on how compelling the story is and how fun finding collectibles is.
A lot of them seem to be registered on the tacmap with locations so that must help. Really looking forward to all the lore and Easter eggs hidden in them.