Halo: Master Chief Collection is an absolute broken mess
Last weekend, I picked up the #Halo Master Chief Collection from the Steam sale with a friend. We wanted to play through Halo 1 again, but it was completely unplayable.
You can't always join another player's session.
Occasionally, nothing happens when starting a mission.
On certain missions the game just completely freezes.
At certain points the game locks up leaving you unable to move.
I've had a generally pleasant experience with the game. All the issues I came across--friends not being able to join matches, lag while on multiplayer--was because of cross-platform issues, one of us was on the MCC version while another was in the original release version, or my own poor internet connection.