Each mission's sub-section will refer back to this video with the time stamp to fast forward to. The video above shows all skull and terminal locations in Halo: CEA. We'll start off with an initial playthrough on Legendary difficulty using the Bandana skull extensively to focus on practicing Legendary speed run paths and to knock out collectibles and any in-mission achievements such as Look Out for the Little Guys, then move on to your Par Time, Par Score, and Legendary speed runs. It has been reported that they occasionally still do, but don't count on it. So don't sweat it if they don't unlock when using Bandana.

You'll have to replay each mission without any 0.00x skulls to do the Par Time, Par Score, and Legendary speed run achievements, however, so you will unlock all of those in due course.

I have still placed the mission-specific achievements at the end of each mission as well as the difficulty achievements at the end of The Maw, but remember that these won't unlock if using a 0.00x mulitplier skull. However, using the Bandana skull (or any skull that has a 0.00x multiplier) will disable the difficulty-related achievements at the end of the game, as well as the mission-completion achievements (Pillar of Autumn, Halo, etc). Note: I mention using the Bandana skull in many instances to make the level-specific achievements, easter egg achievements, etc easier.

Halo ce pillar of autumn