A Tile-based Game Engine written in C# mimicing retro consoles.
C++ lightweight cross-platform game engine
Low-Level Game Engine for Retro Platforms
Multi-platform game engine similar to old Megaman with a stage editor
A game engine written in the D programming language
An advanced flexible game engine for Java.
An online multiplayer turn based strategy game and board game engine.
A 2D Adventure Game & Engine
TR Game Engine allows you to develop your game quickly and easily.
A 3D, fully concurrent game engine
3D game engine for C and C++
A very small multi-platform game engine for creating desktop games.
Open source, moddable game engine for the "Polygon Love 2" game
The Lambda-Engine is a cross platform game engine.