Godot is a powerful cross-platform game engine
Solar2D Game Engine main repository (ex Corona SDK)
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Open source voxel game engine with support for survival and crafting
Xash3D FWGS engine
Game engine supporting many 3D/2D formats and graphic effects
Use the Delta Executor APK with Roblox on a Windows PC.
Satisfying monster shooter
The game engine for everyone
Voxel game-creation platform with easy modding and game creation
A dead simple 2D game engine for Go
GemRB is a portable open-source implementation of the Infinity Engine
Game engine to build text adventures.
New Godot bindings for Swift
Sandbox video game with a powerful physics engine
Open-source engine for Heroes of Might and Magic III
A completely free, open-source, 2D game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Java/JavaFX/Kotlin Game Library (Engine)
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Cross-platform game engine in Rust
Orx: Portable Game Engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented