PixelBoy: Even most games on Steam are DRM-free.
neumi5694: "some" is a better description. About 10% of my games are and according to the list maintained by the community by far less, especially after you take out the indies of the equasion (which you can get guaranteed DRM free on itch.io).
I won't take out indies, because that's what I'm mostly interested in.
And you can find thousands of those with no DRM at all.
If you want commercial AAA games, then the DRM rate is probably well over 90%, maybe close to 100%, but the actual good stuff is very different. Indies and such.
Also, you have two very big misconceptions there.
Itch.io is not DRM-free. Most of the stuff there is DRM-free, maybe like over 99,99%, but they have stuff that has some form of DRM in it. They are not a DRM-free store as such.
And then again, there are loads of games that are on Steam, but not Itch.io.
Obviously it goes the other way too, there are many games on Itch.io that you can't find on Steam.
Most likely, statistically speaking, whether you find on Itch.io, or Steam, or both, it's going to be DRM-free.
I have few hundred games on Itch.io wishlist, and most likely none of them has any DRM.
I have a couple of thousand games on my Steam wishlist, and based on my best guess and experiences, no more than 200 will have some sort of DRM in them (not counting Steam client to download them).
Those lists you mentioned are a good tool, but they are seriously lacking.
I remember a while back I downloaded maybe 10 games from Steam, none had DRM, and none of them was on those lists. If people don't report these games, they won't appear on DRM-free lists automagically.