Lock or disguise any executable, of games or programs, with Game Protector
Game Protector is a free tool you can use to lock with a password any executable file, of a game or of an application.
Game Protector will let you secure any applications you like.
Probable uses would be to protect your children from particular games, protect your PC, etc.
You can also disguise your games to make them look, for example, like Office documents, changing automatically their icon and name.