TXinTXe

The same devs have also desperados 3, and it's also super good (it's on gamepass also if I recall correctly). It's at 50% now: Desperados III

Ok, not so much as hidden, but also not super known:
Shadow Tactics: Blades of the Shogun. A tactical stealth game (think commandos saga back in the day) is 90%
Technobabylon. A pixelated point & click adventure with some cyberpunk themes at 70%
Return of the Obra Dinn. Probably the best detective/deduction game that I've played, at 40%
Prey. One of the best immersive sims, at 75%
The Case of the Golden Idol. Is not as good as Obra Dinn in my opinion, but it's super good none the less, at 30%
Antichamber. Super good puzzle game, at 75%
The Age of Decadence. Ultra hardcore RPG set in ancient Rome, 60%
Tametsi. Is like minesweeper but good, 67% (and only 0.77€)

Splendor and Agricola I've played the base games only so I can't say, but between 7 wonders and duel I prefer clearly the duel version, even if probably the base is the better game objectively.

I'm from Spain, it's not uncommon unfortunately, but that's because the flag is appropriated by the right and far right and if you see someone with one you can be 90% sure of the type (homophobe, anti abortion, bullfighting supporter, climate change denier, etc etc)