the level is arbiter. i am going to make a video on how to get all of the skulls. my username is brendanspartan142
the grunt birthday party skull makesit when you get a headshot on a grunt the grunt yells "yay" and explodes with confetti
If you are trying to find the Grunt Birthday Day party skull, but when you get to the place and it's not there, you may need to get a headshot on the enemy grunt. You should then found the skull in the middle of Crowsnest, which is the second level.
You do not have to find the skulls in any recent version of Halo. If you mean Halo 2, then I'd recommend reloading the level.
it pretty much makes the aliens mad and they try harder to kill you. like the grunt that tries to kill you whe you get the skull.
Its not an achievement, its a silver skull. On the mission "Crows Nest" (the part where the bugs are coming from the pipes after you drop down and Cortona talks to you, at the end at the edge), you will notice that you can go underneath the walkway you were just on. The skull is at the back of that passage.
This skull is a silver skull. It is strictly for your entertainment and you won't get an achievement for it.
Skulls modify certain aspects of the campaign, often increasing difficulty. For instance, the Blind skull completely eliminates your HUD and the Mythic skull increases your enemies' health. Some are amusing, such as Grunt Birthday Party, which causes confetti to launch into the air from a Grunt that receives a headshot.
play on normal or higher. start from the start of the mission and go to the location
There are no cheats, however there are the good old fashioned skulls which make the game more entertaining, such as, Grunt Birthday Party and IWHBYD skull, although they give you no real advantage they are very entertaining
If you are trying to find a Grunt B-Day party skull but when you get to the place where you wanted to buy it, its not there, you should use your phone to look up other stores in the area that might carry it. You can then give them a call to see if it is in stock before you drive there.
you have to start at the beginning of the level crows nest and you have to select the difficulty normal and it is after you fight the brute chieftain and when you drop down after you fight the drones instead of going straighit down when you drop you need to godown slowly and pull back it is at the end of that pipe.
I believe you are missing the IWHBYD (I Would Have Been Your Daddy) skull. Pudding 101 answer: You get it from the Covenant level after you kill truth. (You have to jump through the rings in the order 4654534)