A: Yes, make sure to backup your game files before installing a Codex, and you can revert to the original game if needed.
A: Some Codexes may affect online play, so be cautious and test the Codex in single-player mode before using it online. callofdutymodernwarfareremasteredcodex better
A: Console support for Codexes varies, but most Codexes are designed for PC use. A: Yes, make sure to backup your game