Multi Theft Auto is a game engine
Xash3D FWGS engine
The HTML5 Creation Engine
3D game engine/framework in C, with Luajit and Python bindings now
The game engine for everyone
Ct.js is a desktop game engine that makes learning programming fun
Open source library for creative expression on the web, desktop, etc.
Svelto ECS C# Entity Component System
Full featured MUD server with all the trimmings.
Tools and Z80 engine for creating adventure games. (RUST)
Orx: Portable Game Engine
Game engine to build text adventures.
A cell-based puzzle game featuring classic and completely new puzzles
Ze Text Adventure game Builder : Create as you play !
Pycraft is an open-source, OpenGL based game made in Python
C++ lightweight cross-platform game engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
A game engine for console based text games
Mini game engine for games104
Retro game engine for creating games like it's 1997
Data-oriented and data-driven game engine written in Rust
Free and Open Game Programming Language for Windows and GNU/Linux
Low-Level Game Engine for Retro Platforms
OpenSAGE is a free, open source re-implementation of SAGE