I bought HALO MCC but can only play Halo 4

Hi Young! Sorry to hear about the issue. Let's do our best to sort this out.

What exactly is the error message you got there?
Do you have issues with your other Xbox games or just Halo MCC?

Kindly check the link below and try installing the game there:
https://www.xbox.com/en-US/games/store/halo-the...

If you get the same error, please verify and repair your game files.
Open the Xbox app for Windows.
In My Library, select the game title.
Select the More options (…) button and choose Manage.
Select Files and then Verify and repair.

You may as well repair and reset your Microsoft Store and Xbox app. Once done, sign in to both apps with your correct account.
Repair/Reset apps - https://support.microsoft.com/windows/repair-ap...

Don't forget to install the latest updates of your Windows and get all available updates from the Microsoft Store.
Check for Windows updates - https://support.microsoft.com/windows/update-wi...
Get updates from Microsoft Store - https://support.microsoft.com/account-billing/g...

Best regards,

MCC is a great collection. I finished Halo CE for my 1st time ever. I had only ever finished Halo 4 before. I know I did it backwards lol. But after finishing Halo CE I'm hooked and I will finish Halo 2,3 and 4 (again ). Plus we get Halo ODST for free (I
think as I bought the MCC a week after it was released).

when I play Halo 4 it was the first halo game I played. then I was a fan since. Halo 4 campaign was great. After that I pick up HALO 3 and reach and now I get to play all halo in the MCC.

Custum Browsing is where people can join your forge map that you made, people online can join and play your map that you created in forge. I thought when season 7 of halo mcc came, that any halo with forge in the mcc would be Able to have custum Browsing on it, but it's only reach. I'm wondering if halos like halo 3 , halo 4, and halo 2 anniversary will have custum browsing, I made some pretty cool maps on those games but not halo reach.

I feel your pain. I believe Halo is ruined. Halo 4 was just a what the heck did I just play, and I thought they would of redeemed themselves with Halo 5 beta. I'll stick to the classics, excluding Halo 4. The only GOOD thing 343 has done is the MCC.