GOG has approximately 3840 games; they can all be considered DRM free.
Steam has about 48,348 games... the large majority of these are likely to be DRM free because of the type of game; thousands of RPG maker games or professional done indie games by small studios who don't want to afford DRM.

If Steam implements a DRM free tag would you switch to Steam as your main source of games?

switch? why do you assume i only use gog atm ?

If we're talking sheer numbers, itch.io wins with over 200,000 (!) games, most of which are DRM-free. So, let's just say, quantity isn't everything.

I beg to differ, with both halves of that sentence.

Many users have pointed out that that alleged "game count" is totally illegitimate, since it includes DLCs, and different version of the same identical games, and all kinds of shenanigans like that, which means it certainly isn't an accurate count.

And they certainly cannot "all be considered DRM free."

As for your question in the OP: no, because the Steam launcher is itself DRM. And Steam does not offer DRM-free offline installers either.

The Steam client is DRM, which means every game is locked behind DRM. So the hypothetical question in the OP doesn't make any sense.

A good number of those are PDF games, labelled "physical games", so the number of actual computer games is not that high.

Still, in all fairness, Itch.io has many games that Steam and certainly GOG don't have, and which are great games. If I am randomly browsing through their (very badly organised) store, I will almost every time find some interesting indies to put on my wishlist (or collection, as they call it).

The problem is that they seem to have zero control over what games they accept. I have more than once seen games where the description is something like "this is my first game, I made it in one day", so perhaps it's not a good idea to have stuff like that flooding the store...

GOG actually has 3544 games. And no I wouldn't switch to Steam because a DRM-Free purchase filter is not a DRM-Free distribution guarantee, ie, it does nothing to address the two issues of 1. No offline installers and 2. That DRM could be added into any game in any update after you've bought it, as we've seen with games like Dex that was originally DRM-Free on Steam, but was removed from this list due to DRM added in a patch.

There are also many games on that list with issues, eg, the Steam version of Victor Vran is only DRM-Free on Linux, not Windows. The Steam version of Cognition: An Erica Reed Thriller can be "played" but literally can't save the game without the client running (which in a 19hr long game means it's practically not DRM-Free)...

except 99,99% of those are not games just garbage

Steam is a open client meaning it's basically up to the devs to have drm or not,
gog demands drm-free only games

both systems you have account

difference is
Steam you download from the client
Gog you download from the browser

Both requires the internet at lest once to downlaod the game

As others have said the Client itself is DRM. It has the control over your games

There is nothing, absolutely nothing, stopping Valve pushing an update that wraps currently "DRM Free" steam games in a DRMed executable.

So no, I would never go back to Steam

gog can force everyone to use gog galexy, nothing stopping them

o wait they tried it already...

questions

1. is a browser DRM?
2. is the epic games client DRM?
3. is a client DRM?
4. is downloading games from the internet DRM?

we get our games from a server which requires internet and an ip address

from a browser we have to go to a website to download our games
From a client we to a "website to download our games" since it's a webkit

steam is a store, gog site is a store
if our accounts gets banned then we can't buy games on either and limited or account deleted if bad enough

questions, so many questions

That is annoying, but it's only a one-time problem.
When you use Steam client to download the game once, after that you can just back it up and use it later as you like. In some ways it's even more convenient than GOG installers. For instance, with GOG games I have to back them up twice, first as installers and then as installed folders to have them readily available.

Obviously I prefer GOG for a number of reasons, but I can't see the lack of installers as such being a big problem, if games are otherwise DRM-free. There are some games like that unfortunately.
I believe in most cases that is really some unintentional side effect of achievements, which is one more reason to hate achievements.

Because they are selling the game DRM-free elsewhere, it makes no sense for that to be intended DRM. I have seen some games which have integrated Steam client more deeply than they actually would need to, with the game being broken without the client.

I assume that it is unintended from the developers' side, but then again achievements are part of Steam DRM as written in Steam documentation, so perhaps from Steam's side it is working as intended.

@OP - Unless Steam also changed their method of delivery, and once you bought the game in a DRM-Free state it remained that way for you, even with updates, though I guess you could have agreed to forgo updates to have the game remain DRM-Free, then a BIG NO.

By method of delivery, I mean letting you download an installer, that you could install when and where you like.

Currently Steam only has DRM-Free Lite for some games.

By Lite, I mean you first need to download and install each game via their Steam client. After that, you may need to make some change to a file or shortcut, etc to truly make the game DRM-Free, though it has other limitations.

Once in that DRM-Free state, you need to back it up somewhere. Of course it is in an uncompressed state, so is currently taking up more space than with an installer, especially with huge games, where it will be much more space.

To remedy that, you would need to compress into something like a ZIP file, but that is likely to take a good while ... dependent on game size and number of files.

As others have said, an update can screw things, make the game DRM. Plus you would need to copy the game back in its entirety to the location where the Steam client expects to find it, before you could do any updating. Then you would need to backup the game all over again, zipping it again, etc.

And there may be issues with dependencies outside the game folder, even Registry entries.

So really, Steam DRM-Free is currently not really a decent competitor to GOG DRM-Free.

1. yes you have to log in , so it is
2. yes you have to log in so it is
3. yes you have to log in so it is
4. yes you have to log in oh wait no it is not