In many survival-themed io games, you have to kill other players and eat food to make your character stronger. You will get to the top of the list if you do this over and over. A lot of IO games have these things:
An online multiplayer area that's pretty big and has a competition scoreboard.
The easy rules make it possible for anyone to play. Bigger players who eat food and sometimes other players.

Of course, you can play with other people sometimes, but most of the time, it's "survival of the fittest."
Latest IO Games: .io games have grown a lot and now have a lot of different games, from first-person shooters like Shell Shockers that smash eggs to survival battle royale games like Voxiom and Zombs Royale that put players against zombies.
The newest IO games are Smash Karts and Ev io, a first-person shooter that looks like it was made in the future. Cubes 2048 and Pixel Warfare are two of the newest and best IO games you can play.