1. Agar.io
Agar.io is a game in which a user begins as a small circle. When beginning the game, one needs to find dots to eat and grow. As the user grows; they can eat circles smaller than them and then grow larger. When a player grows larger, they also get slower; however, there are certain mechanisms in this game that can allow a player to destroy larger players. For example, there are spiked green circles which hide players smaller than them, but split larger players into many smaller pieces. this green circle can be shot at a large player when a player shoots part of themselves into the green circle. Players can also split to get a speed boost and catch players slightly smaller than half of their size. All in all, even though this game is somewhat complicated, most players can learn the gameplay within 4-5 games. The game is over when the player gets eaten.