I looked it up again, and I don't see anything that's changed very much. https://partner.steamgames.com/doc/features/drm Steam client has a wrapper dev's can use. They do not claim it is anti-piracy, and recognize it's more of a simple anti-freely-share with dozens of your friends, that can be easily circumvented. Steam recommends using other/3rd party drm on top of their wrapper, or "enhancing" legit copies with steam features that only work with legit Steam-purchased, to make having a legit copy more desirable, like achievements, trading cards, Steam's sever online-MP, etc. I'm pretty sure everything else is 3rd party, eg the current AA/AAA dev-popular Denuvo. The main ez-short test, last I knew, is to rename steam folder and the steam.exe and try to run games via the game exe to see if it'll run if game thinks Steam isn't there. There are many user-sourced sites/lists re: steam-drm free titles, whether they were initially or maybe removed later - but most of these fall into the moderate to very old, certain indies/devs, or somewhat obscure titles category.