Hit the Xbox Guide Button on the controller of the player who wants to leave, and then hit X to sign out of the profile. Profiles are used to control split screen player count, instead of the party like system that is used in later games.

As of Oct 24, 2013, the multiplayer servers are still active and people are playing in them. I just tested it, and it took about 3 minutes for the matchmaking to find me a match.

You can go here to enter these codes on your computer (much faster this way). The terminal code entry page can be translated into A-Z and 0-9 according to this chart. You'll notice the symbol in the middle doesn't have a glyph. Many others translate it to be Æ but that is harder to read in a code, so I will be using #. Below is a list of all known codes to date. The format is "CODE - Unlocks - Obtained from". Current Codes Halo Anniversary 343GS - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video HALO4 - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video SPARK - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video FLOOD - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video EARTH - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video DEMON - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video RINGS - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video ARRAY - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video HUMAN - Terminal Video + 7000cr (Reach) - Halo: Anniversary Terminal Video HAVEN - 2 Terminal Videos + 7000cr (Reach) - Halo: Anniversary Terminal Video Halo 4 Requiem Archive 1 1UK3CVYJZM - Raider Torso Armor + 500xp (Halo 4) - REQUIRED : Complete "Sniper Alley" in Spartan Ops and get code from here. 3VGRZJ1BS6 - Raider Shoulder Armor + 500xp (Halo 4) - REQUIRED : Complete "Land Grab" in Spartan Ops and get code from here. Q239SF2PGZ - Raider Helmet + 500xp (Halo 4) - REQUIRED : Complete "The Challenge" in Spartan Ops and get code from here. *Note: Unlocking Raider Helmet, shoulder, and torso unlocks concept art, 500xp, and the Raider emblem. Requiem Archive 2 MN7VKCZP#Q - Raider "DSTT" Shoulders - REQUIRED : Complete 15 chapters of Spec Ops on Legendary WQ6F2Y1M1P - Raider "DSTT" Torso - REQUIRED : Complete Campaign on Legendary (solo or co-op) 8PXX1SMIQU - Raider "DSTT" Helment - REQUIRED : Play 1000 War Games (Multiplayer) Section 3 Archive T5CE6KV3R8 - 5000xp (Halo 4) + ONI Emblem + Concept Art - REQUIRED : First Data Terminal in Campaign Mission "Requiem" unlocked 9WE621KN8F - 2000xp (Halo 4) + Wiseguy Emblem + Concept Art - REQUIRED : All data terminals unlocked M0DKE#EMQC - Recruit Emblem + 12116xp (Halo 4) - Most likely required to have played at some point on or before 11/8/12. (If it doesn't work on the website, try it on your Xbox 360, and vice versa.) 1K3G7N17LL - "Curious" Article + 20000xp (Halo 4) - No known requirements EBGROIVIDR - LASO Emblem + 50000xp - REQUIRED : Complete the game on Legendary with All Skulls On. Coop or Solo. Mixed reports on Blind being on, but I'd recommend it on. GT#RFIEU6Q - Majestic Concept Art + 25000xp (Halo 4) - No Known Requirements New Codes New codes are being release through an ARG. A forum post is used to track current progress and points to a Wix site meant for collective decoding of clues. On the site you can find a full list of current codes as well as a list of codes in progress. Join in to help find more codes.

Skulls are generally unlocked by finding them in the single player levels, but they're hidden very well, and in some cases require you to take specific actions in order to be able to get to them. In some cases it means jumping on top of a vehicle to get to a hidden location, and other times it means going the wrong way and exploring areas the game seems to try to keep you out of. This site has a full list of all the skull locations in Halo Anniversary. Most of them are pretty sneaky, so don't feel bad about using a guide.

When you buy Halo: Combat Evolved Anniversary, you get two components: the original campaign remastered, along with 6 multiplayer maps and 1 Firefight map using the Halo: Reach engine. If don't own Halo: Reach, you can only play the maps included with Anniversary. There is a Multiplayer option on the title screen of Anniversary that boots up a minimal version of Halo: Reach - namely, only multiplayer with only Anniversary playlists available. If you bought a new copy of Anniversary, it should have included a code that allows you to download the Anniversary Map Pack for Halo: Reach. Once you have done this, these maps work like any other map pack for Halo: Reach - they are available to play (whether in a custom game or in matchmaking) when you run Halo: Reach. If you didn't buy Anniversary new (or only want the maps, and not the remastered campaign), the Anniversary Map Pack can be downloaded for 1200MS points.