Arrowgrab mentioning his 1st game reminded me of
Urban Assault (1998, german, Shooter/Strategy). Something like BattleZone I think. I can't find it anywhere whatsoever. Looks very apocalyptic, but has apparently aged badly.
Dark Reign (1997, australian, RTS): No clue if its has been mentioned here already. One of the first games I ever played. It came out alongside StarCraft and was received positively in at least one german gaming magazine. It has all kinds of different terrain types, which - together with the somewhat slow reaction of units to commands - could at times make a clusterfuck of unit movements. It also made range into one of the most important unit attributes. But it was still not nearly as woeful as Dark Reign 2 managed with some of its mission design. Mostly it just works. Slowly, but still. It's also nice that a lot of things can be automated. Setting the damage tolerance for your valuable Tachion Tanks to "Low" means that they will automatically go to the repair facility, which is quite useful. Or cleaning up the last survivors at the end of a mission. No problem, just tell your whole army to "Search & Destroy" and they will find those annoying little shits. Great unit voices and soundtrack, by the way.
In case of problems with running it, there's always
https://www.darkreignws.com/. I used their 1.7 patch for a while and that worked under Win 8.1, though I still needed to use my old CD to be able to play the campaign. Under Win 10 it doesn't work for me anymore. Also not with the newer 1.8.1 patch. No clue about the gog-version.
Ummh.... and there apparently also is a remake called Redux for Xbox Live for some strange reason.
The latter shot is from Redux.
Abomination - The Nemesis Project (1999, UK, real-time-tactics): I think it might have been mentioned in this thread, but I haven't looked through it in a while. I remember trying the demo a long time ago and I couldn't really get to grips with how odd the controls were.
Restricted Area (2004, german, ARPG): Cyber-punkish ARPG. I got a copy from amazon, but now I can't find any on there anymore. Personally I have found it to be quite fun, like ARPGs tend to be for me. It lacks style in some areas, like with character design and the story is a bit shit, but you'll get a slightly different experience based on character. The soundtrack is good and fitting in my opinion and the dark industrial maps have decent atmosphere. Itemization is fun and well designed with guns and (for one character) melee weapons, bioware and cyberware and so on. The story progression uses the same maps which are also used for side missions, so they are not distinct. Random layouts I think. There are some bosses and special events and such and one woeful timed mission that is unbeatable without the right approach and running speed upgrades. The last mission requires some grinding, because everything there is much higher level than what the player will be assuming normal progression. But overall the game isn't so long, so I never did mind that. Skill system is fine, nothing more, but I like the attribute system. The first time in an ARPG where I always simultaneously want to spend on more than one.
Harbinger (2003, american, ARPG): I have only tried the demo. Seemed interesting enough with the unusual setting, but I still haven't played any more of it. Had some technical issues as well. Typical case of no digital copy being available. In any case, screenshots.
Dominion - Storm over Gift 3 (1998, american, RTS, oddly by Ion Storm): I'm pretty sure it has been mentioned at some point, but whatever. It's not like the games in this thread are in danger of becoming too well known.