Fuck it, I’m too groggy to play games right now. Let’s take a look at some of the major markets and the devs/publishers available in each, shall we?
The criteria is as follows: Not publically listed, not owned by another publically listed gaming firm (investment firm is fine), even partially with a few exception elaborated on below and at minimum a decent reputation.
Major International Firms
Embracer Group (THQ Nordic, Deep Silver, a shitton of other studios)
Focus Home Interactive
Level-5
SEGA
Smilegate
Square Enix Europe (Crystal Dynamics, Eidos Montreal, etc.)
Sumo Group
Valve
Virtuous (Good team of support studios and asset/animation creators)
WB Interactive
United States of America:
3D Realms
Armature Studio
Aspyr (mostly Mac ports though)
Bungie
Bluepoint
Deck Nine
Farsight Studios (pinball)
Forgotten Empires (I think. I have no idea what is going on between it and World’s Edge whether they are the same)
Gearbox
Harmonix
Iron Galaxy
Jackbox Games
Panic Button
The Tetris Company
ThatGameCompany
Turtle Rock
WayForward
Yacht Club Games
Canada:
Behaviour Interactive
Drinkbox Studios
Extremely OK Games (Formerly Matt Makes Games, developers of Celeste)
HB Studios
Next Level Games
Phoenix Labs
Skybox Labs
Studio MDHR
Tribute Games
Japan:
Arc System Works
Camelot Software Planning
Dimps
Grasshopper Manufacture
Idea Factory
Inti Creates
JP Games
Kemco (Lots of games at a minimum, they have their fans)
Kojima Productions
Mistwalker
Natsume
Platinum Games
RED Entertainment
tri-Ace
tri-Crescendo
Valhalla Game Studios
White Owls
Yuke’s
United Kingdom:
4J Studios
Bossa Studios
Chucklefish
FacePunch Studios
Hello Games
Interior/Night
Mediatonic
Playtonic
Rebellion Developments
A Sam Barlow studio
Supermassive Games
Team17
Poland:
The Astronauts
The Farm 51
One More Level
Techland
Teyon
Thing Trunk
Vavel Games
Rest of Europe
Asobo
The Bearded Ladies
Bohemia Interactive
Crytek
Frictional Games
Frogwares
Frozenbytes
GSC Gameworld
Housemarque
IO Interactive
Mercury Steam
Mimimi Games (They did Desperados 3)
Moon Studios (if willing)
Naps Team
Pendulo Studios
Quantic Dream
Slipgate Ironworks
Starbreeze Studios
Two Tribes
Wargaming
China
FYQD
Game Science
Mihoyo
Perfect World Games
South Korea
Blueside Inc.
ESA
Pearl Abyss
Phantagram
Miscellaneous
ACE TEAM (Chile)
Big Ant Studios (Australia)
Krome Studios (Australia)
Tantalus Media (Australia)
Wicked Witch Software (Australia)