Open game and rendering engine packed into a JavaScript framework
Free game engine for development of desktop, mobile, and web games
The ioquake3 community effort to continue supporting/developing id's
Free, cross-platform 2D game engine powered by Haxe and OpenFL
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
2D JavaScript Physics Engine
Cross-platform game engine in Rust
The Tiny JavaScript Game Engine That Can!
Game engine supporting many 3D/2D formats and graphic effects
Free, open source game engine online
Haskell game engine library for roguelike dungeon crawlers
The multiplayer game engine
Engo is an open-source 2D game engine written in Go
A cross-platform 2D game engine
Web powered cross-platform 3D, WebXR game engine
online 4X browser game engine
Multi-platform game engine similar to old Megaman with a stage editor
3D Game engine