- One of my friends, Alice, has an iPad 2nd gen with iOS9.3.5 installed on it.
- My other friend, Bob, has an iPad 4th gen, recently iOS10.0.1 installed on it.
The Game Center app was removed when Bob upgraded to iOS10, and he can't friend Alice or accept her friend request. Alice can't receive the Game Invite Link from Bob because iOS9 thinks it's an iCloud document, opening it in Safari.
How can Alice and Bob play online multiplayer games (e.g. Super Stickman Golf 2) over the internet together?