Source SDK
The Source SDK is a software development kit compiled by Valve Software that is used to create maps…
19 Alternatives To Source SDK
Amazon Lumberyard
Amazon Lumberyard is a free AAA game engine deeply integrated with AWS and Twitch – with full…
Cocos2d-x and Cocos Creator
Cocos Engine Official Website | Cocos Creator | Cocos2d-x | Open Source Cross-Platform Game Development Engine
Unreal Engine
Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Xenko Game Engine
Xenko is an open-source C# game engine designed for the future of gaming.