Interesting, thanks for the links and thanks everyone putting together the lists. Out of curiosity, I went through my favorites and tried to find the country the developer is based in (possibly messed up a few). A few additions to those lists: Moto Racer and Cyber Hook should be on the French list and Beatbuddy should be on the German list.
My list (always semi-arbitrary to select favorites, but based on what I have tagged here minus a couple that I know are no longer available here):
Australia - Hollow Knight
Canada - A Short Hike, Guacamelee
Czechia - Botanicula, Creaks, Samorost 3, Machinarium, Blackhole
Denmark - 140
Finland - Cities in Motion
France - Cyber Hook, Moto Racer
Germany - Beatbuddy, CrossCode
Japan - Tokyo Xanadu, Trails in the Sky series, Ys series, Zwei II, Gurumin, Akiba's Trip
Mexico - Kerbal Space Program
Poland - My Brother Rabbit
Spain - RiME, NyxQuest
Sweeden - Youku's Island Express, Card City Nights
UK/England - Shuggy, Theme Hospital, Pharaoh
UK/Scotland - Roller Coaster Tycoon 1 & 2
US/California - Little Bug, SimCity 3000, Costume Quest, Psychonauts, Stardew Valley, Sword of the Samurai
US/Maryland - Emperor: Rise of the Middle Kingom
US/North Carolina - Bionic Dues
US/Texas - Defender's Quest
US/Washington - Calico, Infinifactory, SpaceChem
Russia - Etherlords 2
The biggest suprise I found looking is that Emperor: Rise of the Middle Kingdom was, it sounds like from Wikipedia, at least mostly done by a shady Maryland company that mostly does military sim stuff (they also did the expansion to Pharaoh).
I don't mind the Summer Sale being delayed, more opportunity to work through my backlog a bit :/.