The FreeSpace Open Installer is the easiest way to install FreeSpace Open, an open-source game engine, graphical upgrade, and content pack for one of the world's finest space shooters. You can use it to install the latest upgrades and enhancements from Hard-Light.net or keep your FSO installation and mods all up-to-date.
The Installer is known to work on Windows, Linux, and Mac. More detailed information can be found on the Hard-Light Wiki.
Simply run the installer and select the mods you would like to download. A copy of FreeSpace 2 is required. If you do not have a FreeSpace 2 installed, the Installer will offer to do it for you using the Good Old Games setup package. (This is very useful if you are running on OSX or Linux, because the setup package is provided as a Windows application.) Of course, you can also install it on your own.
Download the FreeSpace Open Installer (Windows, OSX, Linux)
NOTE: The Installer requires Java 1.5 or newer to run. If you are having trouble getting Java to launch the JAR file, you may wish to download a Windows EXE. (This does not remove the need for Java.)
If you have issues, please post on the FSO Support Forum and we'll help you out!