Do we even have to mention this game? Or any battle-royale title, for that matter.
Fortnite is still one of the most popular games on the planet right now, and likely will still be in 2020. Everyone is playing it, talking about it, or doing the dances from the game. Even if Apex Legends is great, and a new Call of Duty Mobile is on the way. Still, Fortnite reigns supreme, at least right now.
Fortnite is similar to PUBG and is a Battle Royale game. You drop into an Island with 99 other people and try to fight or survive to the bitter end and be the last-man-standing. However, it's like Minecraft mixed with PUBG, as you can craft your own Fort to hide from enemies as you battle.
There's a ton of skill involved. Gather resources, find the best gun, run around with a kill squad of your best friends with a good aim, and get a victory royale! This is a great iPhone game to play with friends, obviously. In fact, you'll NEED friends to win.