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I remember there was a DEFCON talk about anti-cheating measure for counter strike and speaker just noted casually that Valve just scans all processes running on your machine during a match and determines what's a cheating process and what is not via a blacklist. Which begs the question what can't Valve do vis Steam?

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Any software running on your machine can do this unless it is sandboxed. In fact many games go even further and install kernel level rootkits to make sure you are not running unapproved software.

See https://www.osnews.com/story/131665/riot-games-maker-of-leag...

Reminds me of Warden used (at least in the heyday) by Blizzard to prevent cheating in WoW. In the automation community they ended up having to use rootkits to hide the process, as previous methods of spoofing the return signal were denied in Blizzard vs. Glider over EULA infringement.

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