How online games handle in-game congestion varies by game genre. However, with MMORPG games, due to the large number of players in the game at the same time, they have set up several systems to help the traffic flow of players to avoid the game from crashing.
The BEST settings to use! Setup Guide! Tower of Fantasy
Tower of Fantasy sets players to log into the game through servers. From servers you get to choose one of the 8 channels where you create your characters. Inside the channel you are all separated by channel lines.
The reason for this is for players to experience the game on the most optimal settings. Even on channel lines, you could only see up to 30 players on the screen. For mobile platforms, it is only maxed out at 20.
This is because if you have thousands of players in, say, a world boss where thousands of you start spamming your skills together, your unit would overheat or waste you even setting up a simple skill animation.
