Please read the instructions for your operating system below. if you are having trouble installing, please check both the README file and the FAQ. If you still have no luck there, you can post to the forums or chat with us. Please be patient with us, though, since we do this in our scarce spare time.
Note that due to the various Linux and window manager variants we can only provide generic installation instructions here. Please check the FAQ for more verbose instructions. Alternatively, MegaGlest packages are available for a range of Linux distributions now. To install using the MegaGlest installer (which installs to your home directory), please read on.
After downloading the installer package, you need to make it executable. Use your file manager/browser to browse to the directory containing the downloaded file. Right-click the file, select the option to inspect and change this files' properties/permissions, and make the file executable by its owner. Now double-click the file to execute it.
The graphical installer will show up and display the MegaGlest license. Install the game into your home directory (default location) or a location of your choice (within the boundaries of where your Linux user may write to, so probably anywhere below your home directory only). Once the installer completes, a MegaGlest starter/shortcut will show up on your window managers' application menu.
All you should need to do on Windows is to double-click the downloaded file. You may get to see a warning saying that this file you downloaded from the Internet may be unsafe. However, if you downloaded this file from this website, megaglest.org, it is safe to proceed.
Mac OS X
MegaGlest requires Mac OS X 10.4 or newer. You also need to ensure you have X11 installed. X11 is available on the OS X installation DVD - more information on X11 is available on the Apple website. Once you have X11 installed, double-click the ZIP archive you downloaded from the MegaGlest website to extract the application and move that where you prefer (usually the Applications folder). Then just double-click it to start MegaGlest.