If you want to jump into the ultra-popular "battle royale" game genre but don't want to take things too seriously, consider Battlelands Royale. This is basically PUBG or Fortnite turned into a cartoonish top-down shooter.
You still have all the mechanics of a battle royale game, it's just fun and casual at the same time. Fight for survival by parachuting onto the map and facing 32 other players until you're hopefully the last-man-standing.
Honorable mentions: This list could go on and on, as there are dozens of classic games worth playing. For the sake of time, we limited it to the few listed above. However, we do have some honorable mentions we'd recommend you guys download. Games like JoyJoy, Star Knight, Sky Force Reloaded, Into the Night, Unkilled, Shadowgun Legends, Warhammer 40,000, Deer Hunter, Temple Run, Smashy Road, and so many others. We'll update this list periodically with others or new releases so stay tuned.