Voxel game-creation platform with easy modding and game creation
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Free game engine for development of desktop, mobile, and web games
Cross-Platform C++ 2D/3D game engine
3D game engine/framework in C, with Luajit and Python bindings now
Powerful, mature open-source cross-platform game engine for Python
3D Game engine with editor
A refreshingly simple data-driven game engine built in Rust
A pure Go game engine
An isometric arcade-style game of skill, puzzles and exploration
RTSish Game Engine
Injectable LUA scripting system, SDK generator, live property editor
Tools and Z80 engine for creating adventure games. (RUST)
Free, open source game engine online
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
A PICO-8 demake of the SCUMM engine
Go 3D Game Engine
3D C++ Game Engine - yet another open source game engine
2D Game Engine
2D Game Engine with Lua Scripting made on top of SFML
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
A fast, scalable, distributed game server engine/framework for C++
Planimeter Game Engine 2D - LÖVE-based game engine for Lua