If I felt like trying out Call of Duty alternatives, do those even exist? Reddit/Google in its infinite wisdom seems to suggest Insurgency: Sandstorm/Counterstrike, which might honestly be the most retarded recommendation/comparison I've heard in a while. Tried Battlefield, but I wasn't really a fan of the gameplay. Combat Master does kind of replicate some of the faster movement, but it also makes no effort to feel like anything more than a cheap mobile ripoff.
Things don't seem to look good on the zombies front either. Hellbreach: Vegas was jank last time I tried it, and Sker Ritual doesn't seem great either; gave up on it once I saw they completely copy-pasted Cold War's upgrade system, but with completely useless effects like increasing your movement speed by 2% per level.