I'm not talking about developer tools - cheats that come with the game, available in single player (and multiplayer if the host allows it).
But a lot of games do also have accessible to everyone replays that show every order given by every player, so catching a cheater that acted on information not available to them (because for instance they had buddies in other team(s)) isn't particularly hard, especially in tournaments with a lot of eyeballs on those replays.
At scale it’s incredibly hard. Impossibly hard even. So hard no one has successfully solved it! Ever!
But what you’re describing is Valve’s Overwatch system for Counter-Strike. It’s a key component of the anti-cheat ecosystem. But cheating is still rampant in CS and one of the biggest complaints.
"at scale" assumes a popular game - and you end up by giving as an example one of the most popular FPSes ever ! Please give an example of a game with, say, less than a million of copies sold / given away ? (And ideally, not an FPS, we all know these have specific extra challenges involved.)
And "at scale" pretty much means that matches are not competitive, because the sums required for entering a tournament game and given for winning it are going to be too small, won't they ?
P.S.: And for non-competitive games, I would expect that this cheating issue (among others) would be aggravated if you insist on playing with total strangers you will never see again (also part of the scale issue) - maybe just avoid that ?
But popular games are the ones people want to play, and are the ones you’re claiming are immune to this. Look at this comments section - it’s people talking about the top 3-5 games on Pc right now, not the 30th entry in the trending FPS section.
Part of the appeal for cheating is doing it where it has impact - in popular games.
Also, I want to insist on one thing : some of the popular games listed are those that are online-only and/or removed the ability to host your own servers (and/or even worse, have microtransactions).
I have zero sympathy for the kind of asshole that gave money to companies engaging in the despicable behaviour cited above. You were warned. You made your own bed, now lie in it !
But a lot of games do also have accessible to everyone replays that show every order given by every player, so catching a cheater that acted on information not available to them (because for instance they had buddies in other team(s)) isn't particularly hard, especially in tournaments with a lot of eyeballs on those replays.