CS:GO, i would say it's been here for long enough to become a classic FPS.
Played by millions of teens and adults alike, its difficulty highly depends on the game mode you're playing; there is also a nice variety of game modes, PvP Ranked and Casual, PvE (against bots), Battle Royale (not too big), and much more options on the server browser.
With easy to learn and slightly harder to master gameplay and tactics, alright graphics (for a competitive e-sports game that launched in 2012), decent audio, not being pay to win, still receiving occasional updates and (at least) trying to get rid of cheaters, makes Counter-Strike: Global Offensive a nice FPS game for both casual and more competitive gamers.

CS:GO, i would say it's been here for long enough to become a classic FPS. Played by millions of teens and adults alike, its difficulty highly depends on the game mode you're playing; there is also a nice variety of game modes, PvP Ranked and Casual, PvE (against bots), Battle Royale (not too big), and much more options on the server browser. With easy to learn and slightly harder to master gameplay and tactics, alright graphics (for a competitive e-sports game that launched in 2012), decent audio, not being pay to win, still receiving occasional updates and (at least) trying to get rid of cheaters, makes Counter-Strike: Global Offensive a nice FPS game for both casual and more competitive gamers.