The gaming industry is huge and nearly all the big guys are from the US (Epic, Valve, EA, etc).
From EU, there is Ubisoft (Assassins Creed), CD Projekt Red (Cyberpunk 2077, Witcher) and Embracer (Kingdom Come).
Nintendo is non-US at least.
Remedy Entertainment is Finnish. They have Alan Wake and Control game series.
Larian Studios is Belgian, they made Baldur’s Gate 3.GSC Game World (Ukraine) has recently released Stalker 2 (i haven’t play it yet, but looks good)
4A Games (Ukraine) developer of the Metro 2033 series, one of my favourite game series.
Warhorse Studios s.r.o. (Czechia) developer of Kingdom Come Deliverance
Moon Studios (Austria) developer of Ori and the Blind Forest, absolutely lovely jump&run game
Guerrilla Games (Netherlands) developer of Horizon Zero Dawn, excellent action roleplay game, loved playing it
Dontnod Entertainment (France) makes very emotional narrative adventure games like “Life is Strange” (publisher is Square Enix from Japan)
From Germany: The Gothic, Risen and Elex role playing game series… The X series (nothing todo with twitter) With the latest game being X4. Steep learning curve but crazy good afterwards.
Paradox is Swedish (Stellaris, Crusader Kings).
Factorio and Kingdom Come 1/2 is Czech.
Really there are a lot of games. Just not many AAA games.
Fuck the “big guys”. Yes, that includes Ubisoft.
Valve … is unfortunate. They have done really good work for gaming on Linux. But even if they are eternally good-willed (which already seems a bit much to describe the current state, and I assume this will take a sharp downturn once Gabe Newell is not in charge anymore), they are US-based and that carries inherent risks.
GOG store is also to keep in mind. It’s run by CDProject and offers DRM free games
Manor Lords is a Game made in Poland.
I see a huge opportunity here for GOG.com. A gaming platform from Poland. And DRM-free!
Plenty of good indie games made by EU at least. I mean, story driven punch and click (as the steam page description calls it) games like Brok the Investigator (from the French Cowcat Games), short but good enough games like Super Algebrawl and Shotgun King (from PUNKCAKE Délicieux), fun somewhat old-school feeling platformers like Cavern of Dreams (published by London based Super Rare Originals (couldn’t find where Bynine Studio is from, though)), etcetera.