A short GoldSim Player User's Guide is available on the GoldSim web site to explain the basic functions of the GoldSim Player A program that allows you to "play" or "read" an existing GoldSim model without having to license the GoldSim software. The GoldSim Player is available as a free download from the GoldSim website. to the Player user, and the Player also has a Help system. In general, however, it is good practice for an author to provide sufficient instructions (through text boxes, tool-tips for controls, and graphics and text) to enable the user to interact with the Player file A special file format (with the extension .gsp) that can be created by GoldSim and can only be read by the GoldSim Player. that they have created.