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High performance
Engine Popularity within the Game Industry
Language Safety and Binary Security
Commercial Viability and Licensing
Potential for Educational/Standard Implementation
Long-term Support
Free, Open Source
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UnrealYesYesNoMaybe²NoYesNo
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UnityYesYesNoMaybe²NoYesNo
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GodotYesMaybe¹NoYesYesMaybe³Yes
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BevyYesNoYesYesNoMaybe³Yes
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BabylonNoNoYesYesYesYesYes
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ThreeJSNoNoYesYesYesYesYes
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¹: Lacks overal "industry embrace": low availability of professional tooling, technical support, and small number of published titles on mainstream gaming stores
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²: Unreal has a "revenue sharing model" that is unlikely to change, and Unreal's parent company, Epic Games, may be a competitor for "Open Metaverse" plans or Fortnite. Unity has a per-developer-seat model, but they might change their business model in the future.
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³: Both Godot and Bevy are "up-and-coming" contenders in the game industry, focusing on niche developer communities of indie developers. While "open source projects don't die", these engines were not around ten years ago, Lindy Effect is not on their side.
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