RTSish Game Engine
Roblox Shader – Download on Any GPU
INSTEAD - Simple Text Adventure Interpreter.
Cross-platform real-time strategy game (3D)
An isometric arcade-style game of skill, puzzles and exploration
Infinite Yield FE is a powerful FE admin script for Roblox
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Alternative Teeworlds Client with many exciting features!
A cross platform Lua based game engine
3D-Accelerated open-source DOOM engine
EDGE is an advanced DOOM source port
2D ARPG Engine
action/combat flight sim
Scriptable frontend for media applications.
Pear3DEngine is a modern and modular 3D development framework