SCORE MODE AND SKULLS

[EnigmaBiz]

Although there is no achievement:

Par score on every Level
              &
Earn every skull on firefight (check your Bungie profile to see how many you have)

Maybe this "unlocks something".....

[ColdGlider]

Apollo would have already unlocked something if this were true, I believe. 

[EnigmaBiz]

Score Par maybe yes. ( On campaign )
                     but
Acquiring all the fire fight skulls no.*


*just checked nobody has. I am not sure I would ever be ready for such a task, not even Purp has the stamina.

[ColdGlider]

Sorry... I was mistaken.  I thought you meant firefight achievements.  So... what do you mean by firefight skulls?  Sorry to be so thick-headed.

[Imppa]

I think he means playing so long that you eventually have a round with all skulls.
Tough.

[EnigmaBiz]

I think there is 12 sets of skulls, each having a point value. Apollo has 5 or 6 his highest skull is 2mill. check your bungie profile to see how many you have received...

[thebraino]

I looked around a bit, and found a guy who has them all here. he even has the saved game on how he did it in his file share. My brother and I are planning on doing it during the Christmas break or so.