It's arguable whether there's any type of multiplayer game that doesn't get ruined by bots. As an example, bot chess players are known to be extremely good, so

It's arguable whether there's any type of multiplayer game that doesn't get ruined by bots. As an example, bot chess players are known to be extremely good, so they aren't ruining the game by making it too easy for the human player; but if a human is playing a multiplayer chess game, it's probably because they want to play other humans. So by a bot being on there, it's ruining it. Not only that, but if there are enough bots, then they're going to end up playing each other which is a waste of resources. So my point here is, bots can ruin ANY game even ones where the bots are as good or better than most human players at the game and not simply doing something dumb and repetitive. Now, there's the reality which is that the only time you have bots on a large scale in a multiplayer game is when there's something to be gained by their use. Whether it's purely farming the game for the benefit of a player while he's at work so he's at an advantage when he comes back compared to people who did not run bots all day or whether it's someone doing it for actual profit; neither is good for the health of the game. Regular players are then being pushed further down the in game economy and scale of power unless they run bots themselves. And again, there's the issue of wasting resources. For games that don't charge a monthly fee, the proprietors of bots are clearly abusing the system and misappropriating resources of the game developer that's running the servers. Bots should be stopped with every means possible on every game. And when people are caught running them they should be permanently banned for life, IMHO (not just until they buy another copy of the game in question, which is often how this is handled.) If you want to make a game that allows bots openly, go for it. I don't think you'll see much success, though.