All of the above you mentioned and more (Warcraft 1,2,3, Starcraft 1 + addon, Dune 2000, Emperor: Battle for Dune, Sun Age, Ruse, Planetary Annihilation, Dominion: Storm over Gift 3, Universe at War: Earth Assault, Paraworld, Kohan 2, etc.). There is rarely a RTS from 90s or later that I didn't play. C&C series so or so was played to the death. C&C 4 though I never played since it wen't away from base building and ressource collection. The only one from your list I didn't play is sadly the much revered Homeworld. I hopped Gearbox would bring it here but saddly nothing like that happened. The one im holding my fingers crossed at the moment is definitely Act of Aggression from Eugen Systems.

There is this GoG survey where it ask if we want Planetary Annihilation, and the majority voted yes. Wonder why they don't follow up with it.

And by Dominion, you mean this?
I had been meaning to buy it DRM free from desura but I donno why its price is 4 times that of steam.

As for only missing out homeworld, how about total war? Sins of a Solar Empire? Rise of Nation? Age of Empire? Whammer 40K,

Nope, no boycot.

If I really, really like a game and want to support the developers, I get both their GOG and Steam versions.

If a game isn't available on GOG, I simply get it on Steam. I feel enjoyable games should be supported regardless of what platform they're released on.

I don't care for achievements, so GOG is a serious consideration if a game is available on both platforms. The main drawback of GOG seems to be the fact that it seems harder for developers to quickly update their games compared to Steam, so GOG is frequently lagging at least one update behind for many games.

Oh definitely I am in for Total War which is kind of a TBS/RTT mix (not really a RTS). I love the early series (Rome 1, Medieval 1+2, Shogun). Sins of a Solar Empire, definitely in the complete version I would love to get it here. I think I have the retail version that was made before the Rebellion standalone expansion. Rise of Nation + Age of Empires. Definitely. I would love mostly the Rise of Rome expansion for Age of Empires. That one was kind of most fun for me. Or maybe Age of Mythology - epic game. Also waiting for Hegemony games from Longbow.

Regarding Dominion -> Its not the game you mean. Its called Dominon: Storm over Gift 3 and was made in the time of Starcraft 1.

Also regarding Desura - > don't buy anything there since they filled for bankruptcy in June 2015.

Regarding Planetary Annihilation - its not gog that's the problem. It is Uber Enterntainment. They did say lately that after the Planetary Annihilation Titans release they might release the game on gog.

Although I prefer DRM free games I don't boycott Steam. But if I have the choice between GOG and Steam I buy on GOG.
Most games on my Steam account I bought not directly from Steam but from Humble Store, GMG, GG and other Steam key sellers. I'm not especially keen on Steam thingies like achievements, game completion rate etc. but the greenlight and
early access program and the workshop are features I don't find anywhere else.

You mean like this? Almost three months old update and still not available (could be that developer just doesn't care about GoG, I doubt gog staff would sit on an update like this, but still...).

No, there the developer has chosen to abandon support for anything other than steam. That's their choice, nothing will be updated on gog.com or humble or anywhere other than steam.

So it's a few days at most, like I said. If a developer drops support, well that's another thing entirely.
(in fact in the case you're referring to, the dev has dropped support completely for the game, just offering some mod capabilities, no bugfixes etc)

There are several games in my GOG library that have that issue, actually.

Legend of Heroes: Trails in the Sky has periods of there being updates to the Steam version every few days or so and after the patches are considered stable (i.e: fixing stuff without breaking other stuff), the developer will usually create a GOG patch, but I've seen the GOG version lagging behind the Steam version for weeks. Not that weird, the localizer only has one programmer who has to juggle all their PC projects and Steam DOES have a larger user base, but it can still be annoying, especially if the updates were stable to begin with and you're tangling with a bug that was fixed in the Steam version weeks ago.

I recall Unepic's multiplayer mode being a Steam-only feature for months before GOG caught up.

Guacamelee's Steam version had a 4-player mode patched in at the start of the year and when I contacted the developer I was told that the GOG version most likely wouldn't receive said update at all.

The impression I have is that games sold on different platforms are essentially different builds of the software; one with Steamworks integrated into it and one without it. I have the impression that patching the Steamworks version seems to be significantly easier than having to create a stand-alone exe-file that patches the non-DRM version, so smaller developers seem to frequently skirt on the updates.

Anyway, no, it's not a mere matter of days and I've seen it happen several times. It depends on the developer and how much manpower they have available to deal with the GOG patching. Anyway, this is not a problem if you buy a game that has been out for a while and isn't actively worked on any more, but right after release, the update thing can be annoying since it's not uncommon for the Steam version to receive daily updates while the GOG version gets like 2 or 3 big updates, but you're left with an inferior version during the weeks between updates. Especially at the start of a game's release, this could be a valid argument to play the Steam version over the GOG one.

Please mind the bubble, there are people living in it :)

Thank you! And this is the reason why I buy good old games here and good new games on Steam. Perhaps if the patching will get improved here I will change my mind. So no I don't boycott Steam.

Anyway yes, it's a mere matter of days.

Legend of Heroes support on Steam was completely sporadic and undocumented, there were no patch notes ever, no official patch releases ever, it was being maintained by one person in some office somewhere (not exaggerating, this was actually happening) - who probably did her best, but that game's support is fucked.

Unepic's multiplayer mode was tied to a Steam service, it wasn't a thing to be just "patched in" like flipping a switch.
Same for that other game.

Your problem is that you have some weird expectations towards developers and game developing in general. You seem to think that because some people are shit at organizing or simply don't have the manpower, that means you are in some way shape or form correct.

You're not, but you do come across as whiny and entitled - also you don't even seem to understand what is going on.

Depends on the developer. Undocumented, yes. Sporadic, no. I've been a regular on that game's Steam forum since its release (I'm a major fan) and there have been times when there were daily updates, sometimes even more frequent. No updates as in posts announcing patches or changes notes, but frequent instances of Steam downloading updates for the game. Most folks including myself give the programmer some leeway since she's the company's only programmer and doesn't have the time to juggle multiple projects AND write patch notes and she's generally fairly quick to program fixes. But I've been keeping track of both versions and the GOG version was frequently lagging behind. In fact, the Steam version received an update to address a flickering issue in Windows 10 around the end of July. Latest patch here is from January. Not criticizing the company, just pointing this out. True, but that wasn't the only update that was lagging. Take a look at its forum on this site and notice there's at least one thread there asking when GOG's gonna get the update that Steam received already. (which didn't contain online changes, just offline tweaking) The developer replied in that thread that he was sending the update to GOG as he was typing his reply. Said reply was over two weeks after the opening post. It's an indy game, guy has a large workload. I'm not pointing fingers. Merely pointing out that there were delays in updating the version here. Guacamelee's multiplayer is strictly local even on Steam. Nuff said. I'm not raging at the developers for not having the time to release GOG updates in tandem with Steam's. I'm not demanding or expecting that they do. My post isn't meant as an accusation towards the developers. I am, however, pointing out that for a myriad of reasons (manpower, juggling different versions, effort creating stand-alone patches) updates for GOG games are more sporadic than for their Steam versions. I've seen it happen, it's a thing, so I'm correct by pointing that out. No entitlement, just pointing out a phenomenon without throwing judgement around.

Don't get mad, I'm not attacking you personally.

Well yes, it does depend on the developer. All things do.

However, all things being equal, it's true what I said. Whether a handful of developers, who for one reason or another don't deliver an acceptable service, is neither here nor there. It doesn't make your claim true.

In fact, you might well get a game on Steam and find that the developer shafts you there as well for support. It's just not a specific thing to any digital reseller.

What is specific to gog.com is that patches that are deployed on the same time to Steam and gog.com appear a few days later on gog.com than on Steam.

(e.g. patches for Pillars of Eternity are released from the developer at the same time to Steam and gog.com, but take 2-3 days to appear for gog.com customers, while they appear on the same day on Steam)

I only got 1 humble bundle code (torchlight 2), but that humble bundle is the one with torchlight 2 drm-free... also I got the free stealth inc 2 and a free code for trine 2.
So I never bought a single game on steam, I bought all my games on gog... I have uninstalled steam after trine 2.