In a July 2019 Master Chief Collection development update, the team behind the game revealed that the PC port of the collection will be ‘”utilizing an industry-leading anti-cheat solution that will be used to protect matchmade games played on dedicated servers.”
The main reason for the implementation of an anti-cheat system is because the Master Chief Collection on PC will support modding.
Modded content will seemingly be allowed in all of the Collection’s game modes aside from the matchmade games, which makes sense, given as mods would deeply unbalance that part of the game.
You can read the full statement below:
What sort of anti-cheat tools will be used with MCC PC?
For MCC PC we will be utilizing an industry-leading anti-cheat solution that will be used to protect matchmade games played on dedicated servers. We are doing this in order to allow modded content to be used by the community for other game modes they would like to customize. Our goals are to protect players while also providing freedom to players who mod as long as it doesn’t negatively impact others. We will have a lot more to talk about on this in the future as development progresses.
In short, it’s good news for players who want to replace Master Chief with a scale model of Thomas The Tank Engine while also enjoying fair and balanced online matches.
You can read the full developer update by following the link here.