Eva.js is a front-end game engine for creating interactive projects
GemRB is a portable open-source implementation of the Infinity Engine
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )
Game engine supporting many 3D/2D formats and graphic effects
RTSish Game Engine
Old-school 2D game engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
A cell-based puzzle game featuring classic and completely new puzzles
An isometric arcade-style game of skill, puzzles and exploration
Full featured MUD server with all the trimmings.
ZDoom 2.8.1 fork focusing on modernisation, performance and stability
Orx: Portable Game Engine
The world is no longer the same
Tools and Z80 engine for creating adventure games. (RUST)
Amateur 3D Game Engine
Ze Text Adventure game Builder : Create as you play !
API (C#) for simulating certain aspects of a ZX spectrum for porting.
Game engine to build text adventures.
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Pycraft is an open-source, OpenGL based game made in Python
C++ lightweight cross-platform game engine