Halo: The Master Chief Collection is an upcoming compilation of remastered first-person shooter video games from theHalo series for the Xbox One platform. It consists of Halo: Combat Evolved AnniversaryHalo 2Halo 3Halo 4, and their multiplayer modes, complete with their full set of add-on content. All games received graphical upgrades for the release, but Halo 2 received a Halo: Combat Evolved Anniversary-style high-definition overhaul.
The games received no changes to their original stories or gameplay, although the cutscenes have been altered slightly, are animated by Blur Studios and so are slightly longer than they were in the original game. The collection includes a Mission Setlists mode, where players can create and play custom sets of missions from any of the four games.

A New Era For Halo
A new era for Halo
Honoring the iconic hero and his epic journey, the Master Chief’s entire story is brought together as The Master Chief Collection, a collection of all four Halo games, including the re-mastered Halo 2: Anniversary, all at Xbox One visual fidelity and 60 fps. Coming November 11, 2014 at MSRP $59.99.

More Than 100 Multiplayer Maps
More than 100 Multiplayer Maps
In addition to the 45 campaign missions you get with The Master Chief Collection, you can play with your friends on over 100 multiplayer and Spartan Ops maps ( including the original Halo: Combat Evolved maps).*

A Unified Halo
A unified Halo
With the Master Menu, play all four games from start to finish, or jump around and play your favorite missions. Use curated playlists to experience both the campaign and multiplayer modes in a whole new way.


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Who is Gamespy?
PoweredByGameSpy.com is the company that provides the in-game server listings when you pick Multiplayer / Internet in Halo. 

What is happening with GameSpy?
GameSpy was bought by another company (glu.com) awhile ago, and that new company is now planning to shut down support for all games that still use the GameSpy services (which includes Halo PC/CE).
GameSpy had previously stopped supporting some other games, including Halo Trial (the free demo version of Halo), but they were still supporting Halo PC and Halo CE.
Now we are facing the same problem that the Halo Trial community had to deal with last year.

How does this effect Halo ?
Players who currently use the in-game server list would need to use some other method to connect to Halo servers (eg. Direct IP, or Xfire, or something similar). There may even be new alternative listing services to fill the gap. 
But there is little doubt that the loss of GameSpy support will impact traffic to all servers. So it will probably make for an even smaller Halo community than we already have. 

What are the other methods for connecting to Halo servers?
- Xfire Favorite Servers. You can add servers to your Xfire Favorites and then join them through Xfire.
- Direct IP. Each server has an IP address that you can use to connect to the server. Simply type the server IP:port into Halo.
- An alternate GameSpy-type service. Some members of the Halo PC/CE community are working to create an alternate service to restore the server Lobby. Development seems to be going well. Check back before May 31 because you'll need to update your Halo or install a fix to get it working. We will include detailed instructions when it becomes available. 
- Xfire Favorite Servers. You can add servers to your Xfire Favorites and then join them through Xfire.
- Direct IP. Each server has an IP address that you can use to connect to the server. Simply type the server IP:port into Halo.
- An alternate GameSpy-type service. Some members of the Halo PC/CE community are working to create an alternate service to restore the server Lobby. Development seems to be going well. Check back before May 31 because you'll need to update your Halo or install a fix to get it working. We will include detailed instructions when it becomes available. 

Any Updates ? Yes Below - Download And Update For Halo :
Halo PC 1.0.10
Halo CE 1.0.10
Halo PC Dedicated Server 1.0.10
Halo CE Dedicated Server 1.0.10
You can update from within Halo by going to the Internet Lobby and accepting the prompt to update.
'You Must Have Administrator Privileges'  
If you see a prompt "You must have Administrator privileges Then you'll need to right-click on your Halo and "Run as administrator"

Manual Installation Method :    
Downloads (direct from Bungie)
Halo PC
Halo CE 
These files are replacements for the files of the same name that are already in your Halo directory.