Welcome to Halo Answers. What would you like to know?

The halo 3 skulls make the game more difficult. They can take away things like your HUD and sheild, but only once you pick the skull up. At the end of the level the effect goes away, but you can turn the skulls on in the menu. It also makes legendary more interesting if you have all the skulls active.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.