IW4X is a modification of call of duty modern warfare 2.
Specifically, the multiplayer portion which you can get from free anyway but you will not be able to play it without the IW4X mod. This mod adds custom servers and connects you to lobbies around the world.
In this odysee video, I showcase the performance and gameplay of one of these lobbies.
You can download IW4X, iw5 and s1x at: https://xlabs.dev/ for MW2, MW3 and Advanced warfare. It's free and runs great on low end hardware.