The Source SDK is a software development kit compiled by Valve Software that is used to create maps… Created by Valve The Source SDK is a software development kit compiled by Valve Software that is used to create maps or mods for the Source engine, with the exception of Left 4 Dead, Left 4 Dead 2, and Alien Swarm. These games are packaged with their own SDKs, called the Left 4 Dead Authoring Tools, the Left 4 Dead 2 Authoring Tools, and the Alien Swarm SDK respectively. They are all extremely similar to the Source SDK, but tailored slightly to suit each game’s needs.
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Source SDK
Alternatives
| # | Image | App Name | Features | Platforms | Price | Website Link |
| 2 |  |
Maratis | Mac Windows iPhone Linux iPad |
Free | Website | |
| 3 |  |
Xenko Game Engine | Mac Windows Android Xbox Linux iPad |
Free | Website | |
| 4 |  |
Urho3D | Mac Windows Android iPhone Linux Raspberry Pi |
Free | Website | |
| 5 | Cafu Engine | Lua | Windows Linux |
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| 6 |  |
UnrealEd | Windows | Commercial | Website | |
| 7 |  |
Unreal Engine | Mac Windows Linux |
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| 8 |  |
SmartShape | Web | Mac Windows Linux |
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| 9 |  |
Game Guru | Windows | Commercial | Website | |
| 10 |  |
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