so my friend and I have been trying to do the halo 2 campaign legendary co op , we are able to start up the first mission just fine but whenever we try to load the Outskirts one of us seems to disconnect, This only happens on outskirts and did not happen on cairo station any ideas ?
Yeah I’m having the same issue. Cairo station fine, then Co op Outskirts, right after cutscene it always crashes due to network interruption. 
All of Halo reach and halo 1 anniversary Co op was fine, assuming the problem is with halo 2 anniversary.
I also cant connect to co-op or join in co-op game after Cairo Station mission. Cairo Station loads up fine within 2-3mins load time but when i try loading the other missions it just keeps kicking us back to the main lobby.
I’m having the same issue. Did anyone find a fix?
Hi guys. we fixed our issue. Both of us had to also install the multiplayer (not just campaign) part for halo 2. Once we did that it worked… strange that cairo station worked without it…
Friend and I had the same issue, We were unable to load Outskirts for Laso so we just did it solo then reconnected on the next level. Well it happened again on regret and we discovered that if you change your Graphics Quality to Original or lower, it would connect…
heres the vid of how we discovered and fixed the problem. Check the description for the TLDW
https://www.youtube.com/watch?v=8qdTj89yLmA
Yep, the switch from ENHANCED to ORIGINAL for the graphics quality fixed it for my friend and me as well. Thanks for discovering that. I hate how janky this otherwise awesome game’s netcode seems to be.
Hey guys,
Below is a workaround that worked for me and my friend, hopefully it works for you and others as well.
Note: I have also shared this in a better written version on reddit (see link below)
> 2535411804468031;4:
> Hey guys,
>
> This issue occurs for me and my friend when trying to play the missions “Outskirts” and "Regret" on Halo 2 MCC, co-op, legendary difficulty.
>
> However, fortunately there’s a workaround for this (see link + quote below)!
> Note: The first part of the workaround was initially mentioned by Adachibaby (in the thread linked below) so kudos to them for sharing it in the first place!
>
> https://www.halowaypoint.com/en-us/forums/85d779d52cfd46918b4f8b638f2e3c7b/topics/halo-2-anniversary-pc-stucks-at-loading-screen/d934297e-e164-4d0f-befa-f15a8b3d2e53/posts?page=1#post9
>
>
>
>
> > 2535411804468031;9:
> > As of 26-6-2020 me and my friend are still experiencing this issue (Halo 2: Anniversary of the Master Chief Collection).
> >
> > After starting a mission with us two in the lobby (Legendary Difficulty) we both get stuck on loading screen until we both eventually are kicked to the main menu.
> >
> > This issue occurs for us with 100% repro rate (regardless of who is hosting) with the following missions (Legendary):
> > - Outskirts - RegretWe have had to skip those missions which feels unfortunate considering we’re mission out on not only gameplay fun times but also story :< imagine skipping one episode of game of thrones, you really don’t want to do that ^-^’
> >
> > Note: I’m running the game from a mechanical HDD and my friend from an SSD, going to try the mentioned workaround above.
> >
> > Eagerly awaiting a patch that fixes this issue! <3
> >
> > UPDATE 1: My friend installed his game on a mechanical HDD (so we both have it installed on mechanical HDD), and we were able to launch the “Outskirts” mission and both of us saw the opening cinematic then at the end of the cinematic he (host) was kicked to the lobby without an error message, while I (client) was kicked to main menu with a “Connection Interrupted” error message.
> >
> > UPDATE 2 - SUCCESSFUL WORKAROUND: We tried again launching “Outskirts” (Legendary) with both having the game installed on a mechanical HDD, and THIS TIME we skipped the opening cinematic directly as soon as the cinematic started and both of us were able to load into the mission and play it. He (Host) had the video and audio setting to “classic” and he then changed it to “anniversary” after the level started.