lua dev plugin for unreal engine 4 or 5
Gideros Release version
Orx: Portable Game Engine
Game engine supporting many 3D/2D formats and graphic effects
Java Settlers
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
8-bit Graphical API for Java
Source code of the chapters of the book 3D Game Development with LWJGL
3D .NET engine for Windows, Linux, Mac
evolution for vegastrike SpaceSim/Combat/Trade game
Gives agents personality, moods, emotions and emotional attachments.
A generic 2D engine for any kind of game
AMOS BASIC reimplementation in Java
also download updates from files section
Read and write PGN format and test moves for legality.
The next generation mud is an open-source extensible, programmable mud
A generic C++ MUD server featuring a strategy-style hexagon map