Call of Duty: Modern Warfare Remastered (2016) was released for the last generation of consoles and systems, so you can freely play it on top smartphones. This is what Mark Korolev did, who used a Nubia Z50 12+256 GB Android device with a Snapdragon 8 Gen 2 chipset.
He used Termux-Box for emulation, so he ended up running the PC version of Call of Duty: Modern Warfare Remastered. There are no visual or audio artifacts, and you can also play through touch controls.
Call of Duty: Modern Warfare Remastered produces 30-40 FPS with drawdowns depending on the number of special effects on the screen.
Of course, in the new remaster of Modern Warfare II, the mission on the ship looks much more epic. But even Snapdragon 8 Gen 3 is unlikely to handle this without active cooling.
Judging by Mark Korolev’s video, Termux-Box and premium/gaming smartphones are a pass into the world of “heavy gaming” for those who don’t want to spend money on a console or an updated PC. It remains to wait for 30 FPS in Cyberpunk 2077.