Doesn’t look like Vacnet solves anything. Not even wall-hacks. I’m not defending kernel level anticheats btw. I’m argueing that dismissive comments like “devs are lazy” do not have real world basis. It is possible that comprehensive anti cheat is an unsolvable problem. Trust based solutions may be the right way, but in the form of peers trusting each other, as opposed to third party having obscure trust to participants system.
All of those things are already computed on server. The purpouse of anti cheat is to not let computer to game for you. To not precisely click heads, step out of danger within 1ms of seeing it or reliably hit timings and combos. Such things can be hard to detect, and it is an ongoing battle between detectors and cheats. And ordinary people are on the loosing side, as they face forced kernel rootkits, false cheat detections and grace periods during which cheaters are still allowed to play.
That is not true. Valve requires that you do not sell your games cheaper on other platforms, hindering competition.
Would you mind to post what mods did you use? Or is it just zombie survival pack?