Pheww, that's gonna be a long list. Let's see...
- Bullfrog (Theme Park, Dungeon Keeper, Magic Carpet, Populous,...)
- Sir-Tech (Wizardry, Jagged Alliance)
- Lionhead Studios (Black & White)
- New World Computing (Might & Magic)
- Black Isle Studio (Fallout, Baldur's Gate, Icewind Dale, Planetscape Torment)
- Origin Systems (Ultima, Wing Commander)
- Sierra On-Line (Leisure Suit Larry, Caesar, Earthsiege/Starsiege, 3D Ultra Pinball, Lords of the Realm/Magic,...)
- Interplay (Fatal Racing (aka Whiplash), MDK, Descent)
- Blizzard Entertainment (Warcraft, Starcraft, Diablo)
- Westwood Studios (Command & Conquer, Lands of Lore, Dune, Eye of the Beholder)
- Maxis ( Sim City, Sim Tower, Sim...)
- Lucasfilm Games (Monkey Island, Indiana Jones, Afterlife)
There are more, but that's just from the top of my head now
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/