Halo: Reach skulls

As with Halo 3, Halo: Reach has difficulty-multipliers in the appearance of human skulls. In addition, all of the skulls featured in Halo 3 are included in Reach. Just like Halo 3: ODST, skulls are no longer easter egg]s in-game, and can also be accessed in the [[campaign menu without finding it.

Cloud
The Cloud skull is a new skull featured in Halo: Reach. When the skull is on, the player's Motion Sensor is disabled, replacing the Fog skull in Halo 3.

Tough Luck
Tough Luck is a skull where when activated causes enemies to dodge your grenades.

Grunt Birthday Party
The Grunt Birthday Party skull causes headshots on Grunts to explode in a shower of confetti. However, this does no damage, unlike in Halo 3 and Halo 3: ODST.

Firefight Custom Skulls
In Firefight, there are three custom made skulls you can have: Red, Blue, and Yellow.