The game developers of Modern Strike Online have taken inspiration from some of the best first-person shooter games out right now, including Call of Duty Black Ops 2, CS: GO, and many more. Therefore, if you like those games, I'm sure you'll love Modern Strike Online as well!
This game is quite different from its predecessor (Modern Combat 4) in terms of gameplay, so please try it out before judging. You may end up enjoying it.