While it is true that this program creates a registry entry, it is only the settings that are saved there. Considering the only settings in the game are music on/off, it does not effect the portability of the program it just makes the program less stealthy. If you are concerned about this registry entry, simply delete it using registry commander. The registry value is located in software/nerohack/transcendence key, so you could delete the nerohack key and there would be no trace on your computer. I will try launching this application using JauntePE so it will not write to the registry at all. I will let you know how it works. Don’t let the registry entry discourage you from trying this game. It’s a great game.