I like GOG and what they do, but I prefer Steam with all my friends, screenshot sharing, etc.

The Suffering here, is:

a. DRM-FREE
b. Tweaked from GOG stuff in order to run well in modern systems and fixed.

Steam almost never works on their games to provide compatibility; there, mostly modders and community members, are left to work on this. And Steam is DRM-friendly.

So it was GOG that tweaked this game for windows 10, not the developer? I assumed it was the developer, and if they made it more compatible then there's no reason why those same files can't be put on and sold via Steam.

Okay but why post it here in the GOG forums? Sorry but it seems kinda pointless other than seemingly to antagonize GOG users. GOG and Steam are competitors.

What a silly question. These games are currently only being sold here on GOG, so where else could I post this so that it might get the attention of WB?

I assure you, WB is not paying attention to the tech support section of GOG for the game. Might tweet them or something instead.

WB isn't paying attention to these tiny forums. Go tweet them or facebook message them or email them or something else, if you're really so desperate to avoid having to use two gaming services. (Really there's no value to having it on Steam, other than "all my games in one place"; it's not like Steam multiplayer or achievements would be integrated.)

Alternatively, couldn't you buy it from GOG and then add it to steam as a non-steam game?

That way you could have both your steam overlay as well as a DRM-free copy. After all, as you mentioned, GOG is the only one currently selling the game.

Hey that's a good idea! I forgot you could do that, thanks.

No worries, enjoy the game!

My friends will see me playing it, I can upload screenshots, and have Steam overlay.

a. Has been done before, but OK since it's official this time.
b. The only thing THEY did (or could be Warner Bros) was lowering default vertical FOV, unlocking widescreen resolutions and bundle the outdated IndirectSound that makes the game crash on regular basis (but to be fair, the new version did not exist at the time of release if I remember the dates correctly).

The very first widescreen patch by jackfuste was implemented better (http://www.wsgf.org/dr/suffering/en). It adjusts horizontal FOV in regards to screen aspect ratio.

Then ThirteenAG developed a full blown widescreen patch, tackling HUD and in-game videos as well. The only critical problem with his patch, it does the memory patching from a separate thread when the game code is already running, making it crash on some computers.

I took care of that problem in my patch, along with some other known issues (https://www.gog.com/forum/the_suffering_series/the_suffering_series_aio_unofficial_patch).

From what I've seen GOG doesn't have resources to thoroughly patch every single game they sell. When you have an abandoned DOS game, it's easy to bundle DOSBox as the most difficult work was already done by DOSBox devs themselves. With Windows games, it's a bit trickier since you don't have tightly controlled environment DOSBox provides so the game can run as it did in old times without modifications to the game itself.