Awesome List full of Game Company and Engine GitHub Repos
- https://github.com/epicgames/ - Epic Games
- https://github.com/Unity-Technologies Unity
- https://github.com/CRYTEK - Crytek
- https://github.com/aws/lumberyard - Lumberyard
- https://github.com/defold - 2d game engine (mixed license)
- https://github.com/id-Software - ID Games
- https://github.com/cocos2d - 2d game engine (open source)
- https://github.com/godotengine - 3d game engine (open source)
- https://github.com/GarageGames - torque collection of game engines
- https://github.com/sony
- https://github.com/Nintendo
- https://github.com/microsoft
- https://github.com/facebook (Oculus)
- https://github.com/magicleap
- https://github.com/blizzard
- https://github.com/ccpgames
- https://github.com/dena
- https://github.com/electronicarts
- https://github.com/EmbarkStudios
- https://github.com/gree
- https://github.com/riotgames
- https://github.com/Roblox
- https://github.com/ubisoft
- https://github.com/valvesoftware
- https://github.com/warnerbros
- https://github.com/zynga