They are and also aren’t, if you don’t allow 3rd party code to interact with the client “anti-cheat” becomes much easier. To improve responsiveness and reduce

They are and also aren’t, if you don’t allow 3rd party code to interact with the client “anti-cheat” becomes much easier. To improve responsiveness and reduce lag clients today run a lot of simulations and the servers just do basic consolidation within a given time window, server side anti cheat alone is very hard to implement without degrading the user experience on the client which is why anti cheat today is so aggressive on the client side basically looking for any possible manipulation.