Halo 3 -- Skullduggery.

We've been through the campaign mode of Halo 3 a few times. To play the game of course and see the story. We did our initial run through on Heroic. We went back through to unlock the achievement for completing the game on the Legendary difficulty. And we've been through a few of the levels numerous times in search of achievements for the hidden skulls and Marathon Man. We happened to stumble on a few of the skulls such as the silver skull in the first level and the gold skull in the last level. We managed to find the bulk of the remaining skulls by careful and determined searching. The final skull however would have remained forever beyond us had we not looked it up. The process for finding the skull is close to obscene. As I understand it, supposedly a musical cue that relates back to a series of games from Bungie called Marathon that shares much of the same lore as Halo is the initial clue to finding the skull. If you're able to write music then you're able to convert this from musical notes to numbers. These numbers provide the order in which you'll have to then jump through the seven holograms of the Halo rings that are found before the confrontation with the Prophet of Truth. After jumping around like a trained monkey in a circus for a while in the correct order, the skull will then spawn in the level. It even spawns behind you, back towards where you confront Truth, furthering your odds of missing it. Bungie apparently wanted this skull to stay hidden a long time. Fortunately for the rest of us, someone was able to figure it out. As for the terminals, we were actually able to discover all of them. Problem is we didn't actually turn them on. So we had to go back through again to do that correctly. This one involves everyone in the party having to gather around the terminal so someone can hit the right bumper to initiate the sequence allowing everyone to then witness it. We never all gathered around it correctly. We still have to go back for them one more time so that everyone has the achievement. I for one appreciate hidden things in games. Most of the skulls and the terminals all fall within the description of fair. The one skull however, doesn't. That one just strikes me as more than a little unfair.