Step 1. Think of a game that you loved 10+ years ago and you can’t buy anymore (like Black & White, Need For Speed: Underground,…)
Step 2. Go to myabandonware.com and use the search function.
Step 3. Use Lutris to manage the installation process.
You won’t get everything. But you will get a lot of things.
I cant speak to CoD specifically, but being able to locate opponents, shots, activity etc by sound is a massive advantage in many multiplayer shooters. I can personally vouch for its relevance in CS, Apex Legends, Arma 2&3, The Finals, DayZ, and Battlefield.
For your viewing pleasure I leave you with this Viva La Dirt League skit: https://youtu.be/sC8qtyGoGZw