Activision released a Mobile version of Call of Duty. It's a free-to-play game with of course, microtrasactions. It's basically a mosh-pit of sorts, pulling game modes from various Call of Duty titles over the years, it also pulls maps from various games in the series, too. Weapons, abilities are also pulled from the series. You can play it now on Google Play (if you're on Android devices), and Apple's store (if you're on iOS devices).