Can't play any of the games from Master Chief Collection

From my research, the Xbox One Master Chief Collection is not backwards compatible with the xbox 360/original xbox version of the games, you must both have the Master Chief Collection and have an Xbox One to play CoOp online or locally.

Gamepass pc games must be signed in to be used that as a given

You do know that gamepass is NOT sharable any otherway right?

Ah, the problem is that I wasn't logged into the right account on both the Microsoft store and the game pass app. Logging into my alternate account didn't allow me to play the game, even though it worked with other games. It would be helpful if they highlighted this fact.

Well halo reach isn't part of the mcc as it's not part of the master chief story

It's an paid add-on to the mcc just like odst

Only the multiplayer matchmaking is free fyi

Reach is about team noble and tou play noble 6 and odst is about the rookie and buck hence why they weren't included

Halo reach and odst get an HD update with mcc vs the gamepass odst and reach which are 360 copies since the HD remakes makes them xbox one games it removes the region locks that occurs with 360 games

Onto your problem did you sign up for halo waypoint ? Not.sure if there is a pc app but did you check for the waypoint app t?

Waypoint is needed for all halo games and it is something that mcc requires since it affects your matchmaking and armor abilities on the console anyways so either you need to link your waypoint to your xbox account it's how you get bonuses like reach multiplayer or your recon armor on odst or halo 3 which requires certain achievements to be done

I'm having the same problem! Got the master chief collection for Christmas and I can't even play it!