The Echo Engine is a simple game engine for text adventure games
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
Full featured MUD server with all the trimmings.
Tools and Z80 engine for creating adventure games. (RUST)
PyCAPGE - Python Classic Adventure Point and Click Game Engine
A game engine for console based text games
A space race game in the style of A Dark Room
A 3D game engine in java.
An online multiplayer turn based strategy game and board game engine.
Java decentralized cross-platform network multiplayer game engine
Built to be ease of use, with no programming knowledge, Multi-platform
A small text based game engine (VB.Net)
2D physics engine for games
A multiplatform game engine for interactive fiction experiences
C++ Text Adventure Engine
Free Android 2D OpenGL Game Engine
Role Playing Game Engine
Java Client + JS/Canvas Server-Side System, with maintained Objects
"Abysmal Depths" is a simple C++-based text adventure game engine.