Jokes

I think there are three fundamental categories of cheating threat models that actually matter: State poisoning, Information leakage, and Input automation

State poisoning means your game was poorly written, period. Either that's a vuln within the code itself or badly implemented netcode. A 2-player game can have total asynchronous client separation and still be peer-to-peer. A more-than-two-player game is almost always run on a server that serves as the single source of truth. In either case, a game that doesn't make the fundamental guarantee that the inputs available to a player and maybe some initial random seeds are the sole determinant of the gamestate have no hope, and rootkitting your computer because they wrote their game's statemachine or interfaces like shit is not the correct solution. If your answer to this is that big game studios shouldn't have to learn how to write more solid code, this means that the sanctity of their game isn't that important to them, not that they should get to root your computer

Information leakage may be somewhat harder. Often you want the simulation to be running client-side, so a naive model of netplay would have the full state available to all clients from a technical perspective... but this doesn't have to be true. In most cases, you can do partial state with rollbacks to make it much harder to cheat from a technical perspective, even making no guarantees about the clients themselves. I think even when this is hard, the correct path here isn't rootkits, it's approaches that start to approximate zero-knowledge proofs. This also means there's a rich literature of zero-knowledge proofs to draw on

Input automation, to be honest, is basically hopeless to prevent upfront regardless of what you do. If you can plug external hardware into your device at all, you can rig up something that automates your inputs. This can be hard to even verify in person, let alone through even a rootkit. I don't personally think it's worth worrying about that much, but if you care about macros and the like, it's really difficult to prevent. However, if there's money on the line or something, there are good analytic forensic techniques to detect this kind of cheating after the fact. Maybe this is where "AI" could actually help, as some kind of sequence-based anomaly detection that can run in real time might be able to detect unusual input clusters, but I worry that the false positive rate is going to be super high. Honestly seems like a lost cause. But crucially, not a lost cause that you get around via compromising the OS at a kernel level

Anti-cheat that "needs to own your kernel" is more user-hostile corporate bullshit. Most games work fine on linux, but frankly no game is worth a rootkit, and no game needs one. The fact that some companies demand it should be viewed as those companies trying to scam you. That's not how the security of anything on the internet works. It's only how security of a bunch of mobile stuff works because Microsoft has trained generations of otherwise smart people to believe their total lies about security, and Google and Apple have taken advantage of this to secure a massive amount of control and surveillance over everyone who owns a smartphone (Which is increasingly required because they've also convinced people that fake 2FA that's just your phone as a single source of identity that can in fact often effectively be 1FA because it can override other authentication methods in most cases is somehow secure. The fact that everyone has a device with a bunch of proprietary backdoors that they don't have root on and that serves as a single lynchpin through which their life can be ruined is the most fundamental destruction of personal computer and identity security that's ever been realized - to say nothing of privacy, and that's a huge accomplishment given all that Microsoft, Facebook, and Amazon have done and still do to compete for the title)

Giving a corp a backdoor to your computer doesn't secure anything except that corp's ability to fuck with you. Don't believe Microsoft, Apple, Epic Games, The NSA, or anyone else who tells you that the best way to secure something is to give them a backdoor. Fuck all those people. They have not only gotten their slimy tendrils in a ton of people's stuff through these lies, but have propagated bad information about how to do security to a ton of organizations. If someone who works at one of these scummy companies or agencies responds to this with some condescending corp-speak at me, I've got a bunch of work to do so I'll probably not get to you immediately, but I pre-emptively say that making this argument at all fundamentally undermines your credibility, and also I hate you on a personal level. You've been a spook too long and it's rotted your brain, hypothetical internet stranger who might not even exist, quit your job and fix your heart

Basically, don't believe any of this "We have to own your computer for your own good" nonsense. That's a scam. Every time. Also, proprietary software should be assumed inherently insecure by default, not the other way around. A better world is possible