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- Moon Whistle is a classic RPG Maker game made by Kannazuki Sasuke.
- Monster Milktruck is a single-player online game using Google Earth technology.
- MUGEN is a custom fighting game engine.
- The Museum of Broken Memories is an adventure game by Jonas Kyratzes.
- Mechwarrior 1-4 is a robot fighting simulation.
Read more about this topic: List Of Freeware Video Games