The Cowbell Skull has the effect of making explosions more powerful.
It is some were in the second level ,but if you what to know the exact spot look on youtube.
the cowbell skull, it gives you more bang for your buck, meaning that your grenades have bigger explosions
You have to start from the beginning of the level and when you use the grav lift, it's on the fourth, top, floor in the hallway after the room with all of the exploding crates.
No
The first skull on halo 3 is a silver skull. Silver skulls do not award any achievements.
After finding a halo 3 skull, simply pick it up as you would any other weapon.
once you get a skull in halo 3 you can co to the campain options and turn it on different skulls do different things
13
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)
I Would Have Been Your Dad (IWHBYD)
http://www.halo3planet.com/halo-3-skull-locations/ is were I found them
You do not jump through rings to get the tilt skull in halo 3.