Halo 3/Skulls

The skulls are an interesting and fun, challenging part of Halo 3. On one hand, they provide a penalty to make the game more challenging, while also adding a point multiplier while playing in the Meta-Game. 9 of the skulls are colored gold, these will give you an achievement. There are also 4 silver skills, they do not unlock any achievements nor do they have penalties, but rather weird bonuses...

Important Notes:
 * The difficulty must be on normal or higher for these skulls to actually appear in the levels.
 * In order to obtain the skulls in Halo 3, you must start from the beginning of the corresponding mission for that skull.
 * Skulls can only be activated from the campaign options menu.
 * To pick up the skull you must hold like you would any kind of weapon.

The skulls are listed in the order they appear in the game. There are 13 in total. Good Luck.

Blind
Shoot from the hip.

Iron
Death carries a heavy price...

Black Eye
Bash your way to better health.

Grunt Birthday Party
Light a match...

Tough Luck
Your foes always make every saving throw.

Catch Skull
'''Pull pin. Count to three. Throw.'''

Fog
You’ll miss those eyes in the back of your head.

Famine
'''Trust us. Bring a magazine.'''

Cowbell
More bang for your buck.

Thunderstorm
Field promotions for everyone!

IWHBYD
(I Would Have Been Your Daddy)

But the dog beat me over the fence.

Tilt
What was once resistance is now immunity.

Mythic
Coverage under the Covenant Health Plan.