u/mg10pp

This is a list I compiled over the course of several weeks, I tried to include everything from AAA titles to indie ones, from old classics to mobile games for smartphones, in the end my only requirement was to be popular enough. For mobile games in particular I was way more exclusive and generally put them towards the end of the various lists

I also add that I always used the country where the game was developed, but in some cases they were then published by American or Japanese companies. In Ubisoft's case instead I did the opposite and put everything under France, but their titles were often jointly developed with the various subsidiaries from all over Europe and the world

Austria: Ori and the Blind Forest, Bridge Constructor, Anno series (only the first two titles, now under Ubisoft and made in Germany), The Binding of Isaac (made by an Austrian and an American devs), Spongebob: Battle for Bikini Bottom

Belarus/Cyprus: World of Tanks

Belgium: Larian Studio (Baldur's Gate 3, Divinity: Original Sin)

Bulgaria: Surviving Mars, three games of the Tropico series

Croatia: Serious Sam, Scum, Escape Simulator, Doodle Jump

Czech Republic: Kingdom Come: Deliverance, Mafia, Bohemia Interactive (Arma, Operation Flashpoint, Dayz), Truck Simulator series, Factorio, Beat Saber, Space Engineers, Machinarium, Gray Zone Warfare, Top Spin 4

Denmark: IO Interactive (Hitman, 007 First Light, Kane & Lynch), Deep Rock Galactic, Ghostrunner (co-developed with a Polish company), Playdead studio (Limbo, Inside), Subway Surfers

Estonia: Disco Elysium, Buckshot Roulette

Finland: Snake (for Nokia), Remedy Entertainment Studio (Alan Wake, Max Payne, Control, Quantum Break), Cities: Skylines, Ultrakill, Trine, Noita, Wreckfest, My Summer Car, Trials (since 2011 instead it's under Ubisoft), Rovio Entertainment Studio (Angry Birds, Bad Piggies, Bounce Tales), Supercell Studio (Clash Royale, Clash of Clans, Brawl Stars), Hill Climb Racing

France: Ubisoft (Assassin's Creed, Just Dance, Far Cry, Tom Clancy's series, Prince of Persia, Watch Dogs, The Crew, Driver, Rayman, Rabbids, Petz, Immortals Fenyx Rising, Hungry Shark, Brawlhalla etc), Quantic Dream (Detroid Become Human, Heavy Rain, Beyond: Two Souls), Gameloft Studio (Asphalt, Modern Combat, Gangstar Vegas, Minions Rush, Disney Dreamlight Valley), Life is Strange, Clair Obscur: Expedition 33, Microsoft Flight Simulator, A Plague Tale, several Pixar games, Dishonored, Prey, Deathloop, Stray, Sifu, Dead Cells, Streets of Rage 4, Alone in the Dark, Another World, Flashback, Dofus, Zombie Tsunami

Germany: Crytek Studio (first Far Cry game, Crysis, Warface, Hunt Showdown), Enshrouded, Spec Ops: The Line, The Settlers, Everspace, Gothic, some Tropico and Anno games, BeamNG Drive

Hungary: Pinball FX series, War Thunder (created while the developing team was in Russia but now set in Hungary for over a decade)

Iceland: Eve Online

Ireland: Ready or Not, Playrix studio (Gardenscapes, Homescapes, Township; the devs are Russian but moved to Ireland over a decade ago after their first success)

Italy: Assetto Corsa, Hot Wheels Unleashed

Lithuania: Human: Fall Flat, Cooking Fever

Netherlands: Guerrilla Games (Horizon Zero Dawn, Killzone; owned by Sony), Age of Wonders

Norway: Conan Exiles, Dune: Awakening, Megabonk

Poland: CD Projekt Red Studio (The Witcher, Cyberpunk 2077), Techland (Dying Light, Dead Island, Call of Juarez), This War of Mine, Frostpunk, Green Hell, Outriders, Superhot, Ghostunner (co-developed with a Danish company), Silent Hill 2 remake, Darkwood, Layers of Fear, Carrion, Sniper: Ghost Warrior, Manor Lords, Shadow Warrior, Two Worlds, Lords of the Fallen, Thief Simulator, House Flipper, Cooking Simulator

Romania: PC Building Simulator (in collaboration with a British studio)

Serbia: Scorn, Top Eleven Football Manager

Slovenia: Mordhau, Talking Tom

Spain: Metroid Dread, 3 games of the Castelvania series, Commandos, Blasphemous, Gris, Deadlight, Moonlighter, Extreme Car Driving Simulator

Sweden: Minecraft, DICE Studio (Battlefield, Star Wars Battlefront, Mirror's Edge; owned by EA), Hazelight Studios (It Takes Two, Split Fiction, A Way Out), Massive Entertainment Studio (two Tom Clancy titles for Ubisoft, Avatar: Frontiers of Pandora, Star Wars Outlaws), Paradox Interactive Studio (Crusader Kings, Hearts of Iron, Europa Universalis, Stellaris), Payday, Helldivers, Arc Raiders, R.E.P.O., Just Cause, Valheim, Indiana Jones and the Great Circle, four Need for Speed games, Wolfenstein since 2014, Unravel, Little Nightmares, Magicka, V-Rising, Goat Simulator, Satisfactory, Peak (co-developed with an American studio), RV There Yet?, Mad Max, Raft, Warhammer 40,000: Darktide, Hotline Miami, Candy Crush Saga, Geometry Dash

Switzerland: Farming Simulator, Transport Fever, 8 Ball Pool

UK: Grand Theft Auto, Tomb Raider (till 2006), Batman: Arkham, Football Manager, Need for Speed (most of the titles), Forza Horizon and Motorsport, Burnout, Grid, F1, Wipeout, Driver (now under Ubisoft), Rare Studio (Donkey Kong Country, GoldenEye 007, Banjo-Kazooie, Star Fox Adventures, Sea of Thieves), most of the Lego collaboration games (Star Wars, Harry Potter, Batman, Marvel etc), Harry Potter games (till 2011), Facepunch Studios (Garry's Mod, Rust), Worms series, RuneScape, No Man's Sky, Hellblade: Senua's Sacrifice, DmC: Devil May Cry, Lemmings, Frogger, Alien Isolation, Phasmophobia, Fall Guys, PowerWash Simulator, Until Dawn, Sniper Elite, Total War series, LittleBigPlanet, Monument Valley, Jurassic World Evolution, Elite Dangerous, Vampire Survivors, Fable, Prison Architect, Overcooked, Surgeon Simulator, Elite, RollerCoaster Tycoon, Theme Park, Theme Hospital, Populous, The Last Ninja, Sing Star series, First Touch Games Studio (Dream League Soccer, Score Hero), Plague Inc, Sonic Dash

Ukraine: Bubble Shooter, Metro, S.T.A.L.K.E.R., Sherlock Holmes games, Cossacks series

Russia: Tetris, Escape from Tarkov, Hello Neighbor, Loop Hero, Atomic Heart (the studio is now set in Cyprus), War Robots (now in Cyprus), Pathfinder: Kingmaker and Warhammer 40,000: Rogue Trader (the studio is now in Cyprus), Shadow Fight and Vector (the main studios are now in Armenia and Cyprus), Cut the Rope

Turkey: Mount & Blade, Supermarket Simulator, Traffic Rider, Hunter Assassin